Most of the major movie companies, are already only Blue-Ray Disc exclusive, and non-BRD movie companies such as Paramount I believe have an escape clause in their HD-DVD contract, so they also will most likely move over to Blue-Ray.
This can actually in fact play, and most likely will in that case, play into Sony's favor for giving the PS3 a BlueRay format. Simply because it is half the price of an actual BlueRay, and it'll play all of the Blue Ray Movies to boot.
So look forward into the future just a bit, not to mention for Sony, for me personally, the reason I haven't bought a PS3 is because they don't have any games currently that I want at the moment.
However, wait until Metal Gear Solid 4 comes out, I guarantee there will be a flood of people who'll buy a PS3 for MGS4 alone, and then you still have the fact that Tekken 6, and definetly Final Fantasy XIII will have another wave of flock people wanting to get the PS3.
At this moment, PS3 doesn't have a game to me that really stands out in their system, but once a game such as FFXIII or MGS4 comes out, we'll see what happens.
FF series is arguably the most popular rgp series out there, so that will be a huge trump card when it comes out, not to mention Tekken 6 is the most popular 3-D fighting game in the world, which is another trump card, then you have Metal Gear Solid 4, which is arguably the most anticipated game at this time and place.
Everyone forgets that Sony when they first started the PSX didn't do so hot, until in 97 when one game changed the whole face for them...FFVII. That game alone tipped the whole balance into shifting the landslide in a neck to neck battle with the Saturn completely into the the PSX.
I believe if Sony is "going to win" the war it will come from the help of one of those 3 games, if not all of them will contribute into it.
However, if you want my honest opinion, I'd rather have a neck to neck competition between all three of the companies, that way we'll be getting better games from all of them.
So I don't care if Sony comes out on top or not, even though they have the games for the PS3 that I am most anticipating.