I'd love to see a product that fills the "Google Glass: The Good Parts" niche. As much as I was on team "don't film me at the bar" when Google Glass was announced, there really IS the kernel of a neat idea there. Maybe it's just not possible to get the good parts without enabling the bad.
There was a Black Mirror episode about (iirc) contact lenses that offered always-on, high fidelity recording. They were used to turn people into self-survelliance machines with no privacy, whose every experience was subject to review. I suppose any time a thought along the lines of "I'd like that thing from Black Mirror, but..." occurs, it's worth stopping to wonder if you've missed the point. I digress.
I've had dozens of times in life where I wished I essentially had a dashcam for my face. It's such an appealing idea to be able to share "Let me show you just what I saw, as I saw it." Not all the time, but sometimes. And not with everybody, just with some people. The last time this desire occurred to me was during an early morning seven hour car + train + plane + bus + bike + (gratuitous) ferry + walk journey I was taking from North Georgia to Midtown Manhattan. Aside from the intentional bonanza of modes of transport, there are a ton of amazing vistas along the way; going from the woods in moonlight, rounding the curve to come into Atlanta lit up at night, seeing the sun come up over the clouds, the view of Manhattan on the final approach into LGA, etc. As it stands today, at points where I'm not biking or driving, I'll get out my phone to take a picture. "Look, here are three pictures I took" doesn't actually communicate what I want to communicate though. What I would really like is seven hours of footage, mostly played back at 50x speed, but slowing to closer to real time at the interesting parts. When those interesting parts are panoramas, those are the places I'd get out my phone for a picture today. There'd also be parts where nothing individually was particularly picture worthy (say, biking down Ditmars Blvd), but in toto it might be interesting to people.
What I wish I had was something natural-ish looking (i.e. I don't want to take a video of what I see on this trip, not of people staring at a camera rig I'm wearing while trying to take a video of what I see on this trip), in a form factor that I can safely wear and passively use while biking and driving. It would also need the ability to capture seven plus hours of good looking video. And also somehow privacy respecting and not dystopic.