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.
As a counter-argument, I'd point out that we have 3mm thin OLED TVs commercially available today, but we're not seeing any on-board any current space-faring vessels. I think there's a difference between what's technologically possible versus what's technologically and economically feasible and reliable.
If you gave the Alien team easy access to flatscreens or CGI-holograms back then, I bet they would have used those instead. Maybe they would have had them flicker or whatever, to demonstrate that the Nostromo is a hulking rustbucket, but they would have picked whatever they could that would indicate to viewers "This is clearly taking place in The Future".
The difference between CRT monitors and CGI-produced floating holograms is that CRT monitors are real technology, and therefore create a feeling of realism in the film--the Nostromo feels like a real vessel because everything on-board is real. The Prometheus, on the other hand, with is interactive holographic displays, only serves to remind me that I'm being asked to buy into yet another element of fantasy.
All this aside, what I really liked about the look of the Nostromo in Alien was that it contributed to the atmosphere and narrative. Everything just looked so cold -- the lighting, the computer systems... everything served to remind the viewer how uncaring and alone the crew members were. I think Mother in particular serves to illustrate this point. Here you have a machine with a name that should reflect a source of comfort, and yet, ironically, with its perfunctory responses and mechanical sounds, it really drove home the feeling of utter isolation and abandonment. The look and feel of everything on-board the Nostromo just screamed "inhospitable," which in turn directly affected the entire mood of the film. This is an element that will sadly be lost if the Prometheus looks too much like a luxury liner.