timdiggerm said:
Alien wasn't intended to portray an alternate future in which we never progressed beyond CRTs or regressed to CRTs or whatever; it's just that that's what was available (within budget, feasible, etc) to the filmmakers. If you gave the Alien team easy access to flatscreens or CGI-holograms back then, I bet they would have used those instead.
It's funny, though, that the film adaptation of Fahrenheit 451 managed to depict homes with flatscreen TVs, and that was made in 1966.