Having absurd power supply requirements for recent video cards is nothing new, and anyone who has been staying up to date with PC cards, for quite some time now, knows this. Anyone with half a clue could see this issue coming from a mile away for next-gen systems.
PS3 will have the exact same issue, and if Nintendo is going to use a state of the art ATI card, they will as well. Nobody will be immune. These graphics cards in the next-gen systems require enormous power sources, and that's not counting everything else (MB, HDD, etc.). If you can't handle this fact, you might as well count yourself out of all next-gen systems right now. There are no magic power supplies that can deliver the enormous power needed for any of these systems and remain at last generation's size.
Also, these new power supplies put off an incredible amount of heat, there will be absolutely NO WAY IN HELL any next-gen system will have it inside of the system itself. They would be too large and the heat they would put off in a closed system would be insane.