If we were speculating what UIs will look like in the future and came up with something good, why wouldn't we just do them right now? As soon as you do it's inherently no longer "the future."
UI isn’t just a theme. I can imagine a lot of different UI paradigms that either aren’t possible today or just aren’t practically feasible given development constraints.
Minority Report and iron man I are the classic examples, IMO. Interactive holograms, 3D immersion, etc. can’t wait for this era!! Coming soon, it seems (with the “giant heavy headset” caveat)
Unfortunately, it turns out that waving your hands in the air for long periods of time is exhausting. UIs that look great in movies sometimes aren't practical in real life.
I think the Minority Report ui is technically possible but you might need an OS level rewrite to handle it, Iron Man is pretty much regular sized light headset although with voice activated controls that work!
