That sounds excellent to me. And since most consoles lose money, or at least at aren't high profit margin, for the manufacturer, in the long run that will help them also. Actually, that would help with that too, because you wouldn't see the 'near-the-end-of-lifecycle' pricedrops that we do.
That's something that led to Sega's downfall as a console manufacturer, I believe--too many consoles too quickly, at too high a price point. Only the fan/fanatical kept them in business, and even that wasn't enough.
Even if the PS3 is not delayed till then, if Sony and developers still supported it, it would still be good for the average consumer and the industry.
And I don't think consoles as a whole are really going to be threatened too much by the PC. PC's are definitely getting more affordable, but a console is still cheaper initially; also, there's the huge mental linkage of 'PC

ffice::console:living room.'. Especially now that consoles are offering a lot of things that only PCs formerly offered, like online gaming, use of broadband, and the interactivity offered by things like the Eyetoy and microphone-using games.
Plus, PC's lifecycle is shorter; what I mean is, that gaming requirements move a lot faster in PC than console world. My computer is maybe two-3 years old, and it's virtually defunct.
And PC's, while a lot more stable and userfriendly, still have the perception of being incompatible and having high requirements for gaming.
I like PC's, and there are certainly some excellent games on the pc, but I don't think the console market as a whole is going to be very threatened by the PC.