Well, let's see......
ID4 was released in 1996.
Since then, we've seen:
Armageddon
Deep Impact
Mission to Mars
Red Planet
(and my favorite) Battlefield Earth
All of which featured some pretty heavy duty miniature work (along with a fair amount of CG). And, of course, the aforementioned Star Wars prequels.
Miniatures in movies aren't dead. Just different now. The age of kluging together a miniature out of model kit parts and some PVC pipe and sticking it on a C-stand in front of a bluescreen and filming it....well, those days
are gone (and I, too, lament their passing to a degree). But miniatures are still heavily used. It may no longer be the
only way of getting a design on the screen, but depending on what you are trying to accomplish, it may still be a viable option.
One outfit that has made a serious effort to keep utilizing miniatures is New Deal Studios. These guys started out by working at a company called Stetson Visual Services and when he closed down, they formed their own company. They do most of their business in miniatures - not neccessarily the Star Wars/Star Trek/Space:1999 variety - but miniatures nonetheless. Check out this link:
http://www.aviatorvfx.com/index.php
This site focuses on the VFX for The Aviator (2004). You will be amazed at how many miniatures were constructed for the film. Perhaps not a sci-fi film, but it still shows that the old techniques of large sized models, forced perspective, foreground miniatures - all the stuff that was the "cutting edge" of film technology when we were growing up - still works. It just augments newer technology.
Already CG technology is changing. One day, maybe there will be a forum lamenting the passing of digitizing an object with a tablet and a plotter.........(but I doubt it).
GK