i think there are a lot of contributing factors to look into the success of the PS3. least of all being the games slated for release, (mgs4? dmc4? and that awsome looking game Assassin Creed). but also support for BluRay from many movie companies. theres a rumour going round in the chain i work for, that Lucasarts are going to be releasing all 6 star wars movies in HD, on a single BluRay disc.
if a lot of other companies do compilations like that, especially Disney, bearing in mind the price of a standard bluray player compared with a ps3, or even a standard hd player compared to an xbox 360, were gonna see a huge boost in sales for the ps3.