Essentially the PS3 would be able to fulfill it's 10 year cycle in the cloud and remain more competitive than M$ or Ninolddo. The PS4 would be an upgrade "choice" to provide the strong backbone of the cloud perhaps. If the PS4 shipped with Sony(YDL?) Linux would you replace your (as it's called now) desktop pc? Could a PSP2/3 become a notebook with Sony(YDL?) Linux? And don't forget your Sony robot's uses.
At some point expect the discovery and adoption rate of new computer concepts to start happening really quickly. With computer hardware doubling exponentially their entire lives there has to be a point where the user expects new concepts doubling availability, we will come to depend on new and better change quickly. We already expect this in security, faster every time, FOSS opens the door for universal translatable code.
I've always seen quite simply how Sony must be aiming far. Of the three, they made the glossy black machine that looks so damn good and for a technology enthusiast like myself I would have only "felt good" with the black machine. I'm sure most will laugh but the beige and off white cases that we used to use look revolting to those that have been surrounded by them for 25 years.
There must only be "big" changes ahead but I would expect nothing more than a fancy graphical effect from M$ or an out to lunch "pay-every-step-of-the-way" approach to their cloud. And if you sell them your arms maybe they'll open their slow closed code base. Sure by then we'll have brain controllers but do you really want ads and spam up in there because of a loose M$ screw or a backdoor deal?
Sorry I got a little off-topic but it was fun.