Personally i dont know why poeple care if they make pci-e video cards from now on.  If your gonna end up upgrading your gonna buy a new motherboard anyway.  I mean im stuck with the x800 xt being the best card that will fit in my computer so i know that will last more then 2 years which is when i buy a new computer.  Im getting my video card next week which it might be the x800 pro becuase theres no xt's anywhere!  
The x850 wont fit for 2 reasons, 1.My computer is agp 2. I own a shuttle sn95g5 which theres no way that card will fit in that thing.  I have no worryies becuase pro and xt will last me the 2 years before i buy a new computer.  Hell iv been using a radeon 8500 128 le for the last 2 years and 3 months tell i got my new computer.  Had it for 3 weeks now with the 8500 inside it becuase my card hasnt arrived yet : (   
REALLY MAD!  feels like i wasted money buying this computer and getting screwed on video card.
Athlon 64 3500
1g corsair
74 gig raptor
radeon 8500 - soon x800 pro (i hope xt)