I asked for the SINGLE most-important new thing, and I'm getting lists! You people are driving me SANE!!

hehe
It's kinda hard to count the votes with the kinds of replies I got, but so far it sounds like xHammer, SATA, Hyperthreading, and DDR-II/QDR are the top votes. At least, the top REALISTIC votes. I thought I saw one vote for a psionic interface in there somewhere.
I may be off, but I thought Hyperthreading was an Intel thing, right? Guess I'd wait a REALLY long time for xHammer with Hyperthreading, hehe.