Nice Starcraft, but I seriously doubt that Sony bails out after this generation. They tasted the blood of PS1 and PS2 success and they will desperately be trying to get it back.
But you better believe that they will try to "borrow" from the success of their gaming brothers and try to find a unique money making (proprietary) gimmick to stick into the system. And they will definitely not create such lost leading system again. I honestly believe they may even stick with the Cell and keep cost down for 3rd party developers who have invested engines into the system.
But then again they could come back still arrogant and full of themselves, create another different architecture and put an unproven expensive proprietary device into the system, causing it to be too expensive for normal consumers and alienating the developers who don't have more dedicated resources into one of three (four if Apple does joins the fight) consoles on the market. Hell they can't even get it into their heads that $500, no matter what is in the box, is too expensive for a console in this market.