I just ran into this article over at smarthouse.com that is pretty good. (This link will open a new window to Smarthouse.com)
The only thing about it is that it says.... PS4 in 2010.
The article mentions virtually nothing to support this claim in the article PS4. 2010 is pretty far in the future, and I'm sure that is just a ballpark number to begin with.
With that said this article is a good read.
The writer speaks about his impression of the PS3, and advantages the PS3 has over it's competitiors.

Read it for yourself, I wont say anymore about it!