I'm hearing a number of reports that early BD commercial movies are still just MPEG-2, with H.264 to come. I wonder if that may be part of the disparity in system requirements.
I think those of us who have vid-cards that support Avivo or PureVideo HD (both having hardware-assist H.264 decode) will be needing them when the new formats arrives.
Intel Q9450 @3.2GHz, Gigabyte GA EP45-UD3P, 4 x 2GB G.Skill @4-4-4-12
Antec P160SW case (modded), Xigmatek 750w PSU
3x 500GB (RAID-5), , OptiArc 7200S, ASUS E818A3T
Creative X-Fi XtremeGamer, Hauppauge HVR-1800, Radeon 4890