A consideration ...
DVD was the previous fastest adopted movie format because it was released in 1996 and in 2003 it finally represented more than 50% of movie rentals; I believe it passed 50% of movie sales in 2002 but can't find a reference for that.
Blu-Ray and HD-DVD were released in 2006 and if they followed the same growth rate of DVD they would represent 50% of rentals and/or sales well after this generation is over.
Now, if some people got their wish and HD-DVD was erased off the face of the earth tomorow the PS3 would benefit from Blu-Ray's victory but not to the extent some people would expect. The inclusion of Blu-Ray should ensure some level of stability in the sales of the PS3 because, after all, if the PS3 didn't get a single exclusive game from now on it would still have a healthy future in playing multiplatform releases and Blu-Ray movies; unfotunately, very soon Blu-Ray players will be less expensive than a PS3 so it will not sell as a Blu-Ray player to many people in the future.
