Biggest new feature they could add would be to not have an additional screen taking up battery life and shining in my face, unable to be dimmed with f.lux. Maybe instead we could have a row of keys that provide some sort of function, and maybe a key that allows the user to escape. That would be a pretty useful feature that I can guarantee I would use dozens or hundreds of times a day. I'm considering replacing my Mac…
https://store.artlebedev.com/electronics/devices/optimus-pop...
To me, this is the best of both worlds. Just put the default keys to start and then let your users pick if they want to. I prefer individual keys to tapping a screen, which is why I use a laptop and not an iPad.