Sports (and events) Netflix/live streaming. That would kill cable for sure.

A curated "channel-like" experience for Netflix/YouTube shows. There's a LOT of good content out there, but it's hard to filter. And the "channel" experience of surfing and switching between programs has been kind of lost.

A different kind of smartphone, with actual buttons. Or maybe even what one manufacturer (Samsung?) tried to do, splitting the phone experience from the smart experience, with one ergonomically good device for calls, and another for messages and browsing. I also very often want to be looking at my screen while on a call (check mail, google stuff, look at maps).

I also miss the experience of the slide-to-answer on my old Nokia n86, or flip-to-answer like the Motorola Razr. I could also make calls without looking.