It pains me to say this but who the fuck is going to buy psp2 as a gaming device? psp needs to be more than just a gaming device: an all in one machine that lets you facebook, tweet, game with amazing portable graphics, listen to music, browse the internet, download bite size games on the go for casuals, touch screen, multi-touch. It needs to hit every single market "trend" of today and tomorrow if they want to stay in this battle and take back some of their marketshare.
Power shouldn't be their concern. If power is their concern Sony has already lost. 3ds already has the developers, support, and all that. iOS has the user community and support and tons of apps. Sony needs both.