You're probably already aware, but there's a nice feature on the 6s and 6s plus which somewhat handles this: double touch the home button (without pushing it down) and the screen moves down by half, leaving only the top half of the screen visible. Makes it a lot easier to reach options located at the top of the screen.
> I just don't think they really have anything usable.
I'm not sure that's the purpose. I wouldn't think of this as being intended to be a fully usable product right now. They could be intending it merely as an interesting experiment to explore new possibilities for interaction with mobile and wearable tech.
Another CS student came up with a virtual keyboard using the iPhone's accelerometer[1]. It only had ~80% accuracy[2], so was it all that useful or practical? Probably not. But could it lead to another person or company refining the technique for production in the future? Certainly.
I'm curious: is it likely that Apple was under a gag order regarding the backdoor proposals/discussions?
I've always wondered why large tech companies/corporations abide by such orders instead of speaking out. Even if Apple was under a gag order, they've created a PR nightmare for the alphabet agencies; Apple could be pursued in court, but that pursuit would now likely be done in the face of negative public opinion.