Except for hardcore gamers, in my opinion there is no reason for "low-performing gaming consoles" when in 2-3 years a mid-priced smartphone with HDMI + bluetooth running Android will reach similar results. They can become a platform-agnostic seal, providing what users want from them: Mario stuff and fun family games.
I hope this mean not only first class graphics API porting (e.g. OpenGL), but also production-grade computing API (e.g. OpenCL) without vendor-specific crap (try to rebuild OpenCL stuff with the AMD """""SDK""""").
Why such massive computational power? Just to decode h264 streams and spend lots of money in centralized servers? For that there is no need for releasing a PS4, they could use current PS3 hardware, more than enough for receive and play such streams.
IMO, Sony will go bankrupt eventually. That is non-sense, and non-scalable.
... I don't give a damn. Instead of selling Windows 7 and 8 at reasonable prices, you're turning Windows 8 into 200$, after some time in the 30-40$ (source. You'll die, slowly, because of being greedy and short-sighted. In my opinion.