Power consumption might not tell you everything, but it certainly is AN aspect of figuring out how powerful a console is though.
Is it possible that a console developed in the last few years can outperform a console developed 8-9 years ago, using less electricity? Of course.
But its certainly not going to be the kind of improvement I will demand from the next Xbox.
If it comes with anything less than a 200W PSU I will be hugely disappointed. Why? Because my gaming PC running a mid-range graphics card uses 260W at peak and I would hope that the new Xbox will be slightly more powerful than that. My PC is comfortable at 1080p with everything turned on for TODAYS GAMES (unless you demand 60fps, then you would have to turn down the effects/resolution), but I do not expect it to remain so for 5 years. With the costs involved with developing a console however, it absolutely needs to remain relevant that long.
Even taking into account consoles being more efficient than PCs, its going to take a LOT more electricity than what the Wii U pulls if they want to produce a console that is a significant improvement over their previous generation.
The bottom line is, the Wii U can get away with these specifications because its previous generation is the Wii and its a HUGE improvement over that. Had the Wii been as powerful as the Xbox 360, the Wii U would have had to be at least twice as powerful as it is, to be a worthwhile upgrade.
Edited by Alex Atkin UK, 10 December 2012 - 01:44 PM.