ok, xbox core, xbox premium, xbox elite and xbox arcade which replaced the original core model
ps3. 20gb, 60gb, 40gb, 80gb, and rumored and pretty muched comfirmed is 120gb ps3 with dualshock 3 controller.
thats 4 sku's for xbox 360 in 2+ years and 5 for ps3 in 1+ year.
and blu-ray aint going to do shit, it might sell for 2-3 years then by that time everything will be digitally distrubited. movies, games, music, etc will be available for purchase online and stream right to your house. blu-ray is supposed to be the last physical format for that kind of shit.
and the difference from vhs to dvd was much more noticeable then from dvd to blu-ray.