This repeated notion of a truly converged OS is really annoying and it is very disappointing to see Ubuntu continue to pursue it despite the loud complaints of most of their users. Lets point out the obvious: the user interaction of a small handheld device is very different than that of a computer with a full size monitor and mouse. Thus any os's on those two devices have to have different UI features. That's it. Of…
>Lets point out the obvious: the user interaction of a small handheld device is very different than that of a computer with a full size monitor and mouse. And what happens in-between? What happens in the case of tablets? Notebooks with a touchscreen? Future devices like large format displays with full UI, and future paradigms like gesture control?
Notebooks with a touchscreen can be treated either as tablets with a bunch of integrated USB/Bluetooth peripherals, if you want to use them like MS Surface, or alternatively, a regular notebook with an oversized multitouch-enabled trackpad that happens to be the display. So there's no need for a new UI paradigm there.
Super-large or gesture-controlled devices will probably need their own UI paradigms when they become mainstream.
None of this is meant to imply that every device will need its own, incompatible, radically different UI. Competent designers should be able to come up with a "line-up" of 3-4 UIs that "gracefully degrade" into one another, e.g. a menu bar appears if the device has a mouse, and non-maximized apps are allowed if the screen is larger than X inches. And of course, lots of options for power users, e.g. I want non-maxed apps in my 7-inch device even though the default only triggers them in 10-inch devices, and I want Alt+Tab to switch between windows rather than apps.