Understand that for most, yesterday's event was a disappointment. For me it was a good step in the right direction, despite the boring presentation.
(I'm speaking as an Apple user, not claiming Apple came up with all these first)
1. Touch
First they made Apple users get used to, in laptops, working with a trackpad for more functionality than just moving the mouse and clicking. Then they reduced the profile of the keys. Now they've introduced a touchscreen in our keyboard area.
Wouldn't be surprised if we see a move towards a full touch keyboard. How? Not sure. Today "me" would think of some kind of glass like material that could display any layout and image while molding its surface to it (or at least something like the Optimus keyboard done properly). Tomorrow "me" will probably thinking of completely getting rid of it and using the future AirPods as wireless brain interfaces (you can ridicule me for this if you want, I know I would).
Nevertheless, we got physical keys replaced by something more flexible and that will give us a more meaningful interface for what you can do depending on the context we are working in. Alpha-numeric shortcuts will always have a steeper learning curve than an good icon or descriptive button (some real estate issues there for the number of combinations, one for UX to solve).
Know that this doesn't seem much, but it is once you start thinking of the possibilities and that it's only the beginning of what's to come.
Will talk about Microsoft later in this comment...
2. "Standard" ports
Finally! Thunderbolt 3/USB-C.
Dongle fest? Maybe in the first year or two. Then it means every single peripheral (power, external SSD, network, screens) will only use one physical interface to connect to your Apple laptop (others have also started doing this, so the wheels are in motion already).
What about your old peripherals? I'm a hoarder when it comes to tech, so still have PS/2 keyboards and mice at my parents'... Remember then? What about Serial? Sure, it was over a longer period of time, but things evolve quite faster now, especially when you are trying to simplify and make things smaller, lighter. Different physical interfaces are the enemy in these cases.
As I've previously said, was surprised that the iPhone 7 didn't come with Thunderbolt 3/USB-C. Imagine it was either some control issue they wanted to maintain or didn't want to rebuild/refactor that part of the device just yet. Would expect the next iPhone to make the jump and join the USB-C family.
Have addressed the issue of SD Cards and such in comments in the iPhone 7 thread. The future is wireless, which is also valid for cameras. Pain in the short term, bliss in the medium-long. My 2 year old Panasonic compact camera has Wi-Fi, others have Bluetooth (and I'm not saying it's the best experience as it is, mostly due to poor attention to the software, since cards are still the preferred way).
3. Apple TV
They now seem to be a bit more serious about Apple TV. Why? Remember when they used to go silent for years?
Sure, nothing groundbreaking or that it hasn't been done by others, but it is becoming a more enticing device now that they are at least catching up to the rest of the devices. Still think that using it for socialize during sports is grasping at straws. You know you want full screen for the transmission and just use your smartphone/tablet to comment... Maybe work on a better integration there?
4. What about computing (CPU, memory, graphics) power?
Need more than 16GB of RAM at this stage? Better graphics card? Mac Pro. Want a laptop? Not Apple at this point.
Wait for the next iteration. This wasn't one of those, as you only change so much between them to minimise complications.
5. What about the Air?
Look at the Macbook and the new Macbook Pro? The Air was the spearhead, the prototype that made both possible and prepared the audience, it will potentially die, which kind of makes sense (the amount of choice was becoming overwhelming and probably not that efficient from a production POV: more lines to manage and maintain, less focus on each one).
6. Microsoft
Yes, their new computer looks nice, for people in graphic design and audio/video editing maybe.
Going to be polemic, but I think the dial is a gimmick and will be the source of a lot of frustration. You can already do a lot with touch and I reckon physical device feedback is still better than bland plain touch. However apart for a niche application, I don't see the general public using it.
Big touch screen? Unless they revolutionise the way we do touch and interact with the OS, and I hope they do, it will get boring and a pain to use for most people that simply browse, watch videos, listen to music, send emails and play some games. Kids? You probably go for an iPad Pro or equivalent, something you can carry around easily.
Final thoughts
My take on Apple at the moment is that, despite what people say, that they've lost their way and are doomed, I think that's not going to happen, they do have a vision for their ecosystem and they are focusing on it, both on the hardware as well as well as the services side and experience.
They are slowly introducing changes which minimises the risk (of going down the wrong path) and allows them to learn more from users as they go. Think that 5 years from now when you look back, the evolution and experience will be quite clear (and again, the mostly mocked AirPods are going to be pivotal in this, not because of the sound or current function but because of what, as a device to be developed, they'll enable).
We cannot expect big bang innovation every year or even every few years and when it does happen, you then take a while to refine it and make it better.