Are you talking about the transparent hand terminals? I think that effect was just to make it convenient to show the screen and the face of the person looking at it in the same frame—I don’t think there’s much demand for that in real life.

And if you mean controlling 3 dimensional projections from your phone, we can sorta do that right now, it’s just clunky and expensive and there’s very little actual demand for it outside of show business and art projects.

I think the ability to just flick your phone display to any larger display nearby like they do would be pretty rad but would require a secure and universal protocol that every display manufacturer would need to follow, so this is probably just as unlikely as the plexiglass tablet phones they use in the show.

The transparent screens exist now (see em in shopping malls and whatnot) but the other parts of a phone aren’t transparent, like the system board, battery, etc. So those parts gotta shrink into the “handle” somehow.