I don't know how accurate this is, but I personally factor in the fact that the USCSS Prometheus was Weyland's pet project that the corporation has been working on for years.
The Nostromo is a product of a point in time where space is completely commercialized - cheap or old spaceships are thrown out solely to bring back profit.
They don't want to put in all the latest gadgets, especially on a ship where it's unnecessary. For example, the holograms look like they are on the cryotubes so that an external presence - David - can monitor the crew's progress and status. By the time ALIEN comes around, the ship is able to do this all by itself (note how the crew of the Nostromo don't seem to have as dramatic side effects as the crew of the Prometheus). At that point, Weyland-Yutani ships don't need an android wandering around the ship to check up on things, so the screens on the cryotubes become extraneous and are thus removed.