eXistenZ deserved the attention that The Matrix got.
For one that's *really* been forgotten, how about The Cider House Rules?
The movie from that year I will be watching for the first time some time in the next week is Titus. [I was going to embed the movie poster but it looks like I can't do that on this board right now?] Hope it's good, the BBC and Globe Theater versions are both winners! Both times The Globe produced it there were allegedly people fainting and walking out at nearly every performance.
Once again, I wanted to embed this: