AGP has suddenly become obsolete.
It's not sudden. PCIE has been in the pipeline for what? 2+ years now? It's just that AGP is quickly nearing the end of it's life cycle. But PCIE sure isn't sudden.
I'm holding off on a PCIE card too. Just spent 350 bux on a 7800GS a couple weeks ago. Put my 6800GT into my SageTV box.
(Woot, and picked up a dell 30 inch lcd today too... which is totally off the topic, but it's definitely an upgrade to my 19" CRT I've been using.)