I don't think it will make MUCH of a difference.
Sure they will sell well, but the PS3 is at a sweet spot with 299.
If they need to a drop to 250 it will make this a "non issue" as KB would put it.
Plus "It's Official: PS3 Has The Best Library Ever" http://www.1up.com/do/newsStory?cId=3178474
I think everything will be juuuuuuuuuust fine