My guess is Sony won't release the PS3 until they make sure the system will be compatible for most consumers.
I would also venture that the PS3 will be just as good as any of the Blu-Ray players out there, Microsoft loses around $200.00 on every 360 sold, I'm guessing Sony will do the same to keep the quality high and make it up in game sales. And yeah I do just want a PS3

A computer once beat me at chess, but it was no match for me at kick boxing.