With that said, if Heckendorn manages to integrate USB ports, a working keyboard, and a rechargable battery
Its a portable high-end game mod. Not a computer. The intent was never to be a computer. If the person wanted a computer, he could spend $500~650 on a HP/Acer with a 17" screen and be more functional without the work.
Yeah, battery would always be a problem... Even if he stuck in a battery that is twice as big as a typical 17" notebook, the PS3-mod would only have enough power for about 30min... at best.
But having the monitor included with his MOD, it allows him to setup anywhere with AC, to play.
When I and most people use our notebooks, its with AC power. (1) faster CPU mode (2) brighter screen. I'd say out of 10hrs of use, maybe 1 of it would be on battery mode.
Its a very cool mod, it looks very good.