This doesn't prove that the experience offered by the other consoles will be better.

The Wii U power brick I saw a while back was 75 and for comparison the WIi power supply was rated at 52W. The Wii consumed only 18W and that was after the power losses for the brick were factored in. A likely optimistic figure for overall power consumption of the Wii U is likely to be about 35W-40W, theres a decent chance it will be less than this and a small chance it will be more. However given the fact that the internal volume is only 1/3rd larger than the Wii I doubt it'll be higher.

The 35-40W is everything inside the console from the optical drive to the wireless chips and these parts don't affect the performance, likely you'd expect the other stuff to consume around 10W of power so that leaves about 25-30W for the RAM, CPU/GPU or the performance bits.

A good estimate of the power consumption of the PS4/Xb3 will probably be around 100-150W for the box (not including PSU losses). When you take out around 20W for things like HDD's, optical drives etc it leaves you with around 80-130W of performance. The power available for the chips in the PS4 and Xb3 will likely be between 2.5-5 times greater than the Wii U.

The PS4/Xb3 will likely be on a newer process node and they won't be designed as Ghz speed demons so their energy efficiency compared to the original PS3/Xb 360 will also be significantly better as well. Not only will they have 2.5*-5* more power to play with, they will have almost twice the performance for the same power level due to having a node advantage for the GPU and 1.5 nodes on the CPU.

Bottom line 2.5*-5* more power with 2* more efficiency = 5-10* more raw performance minus  ~20% due to potential bottlenecks/less than ideal scaling = 4-8* the performance.

How many times more powerful were the PS3 and X360 than the Wii?

I... didn't understand anything of that. At all.

Not sure if serious. Power consumption has little to do with determining graphical capability, though arguably has a correlation.

That made no sense to me, I'm afraid - it sounds like the WiiU is less powerful than the Wii based on that OP

The Wii consumed 18W and the Wii U will consume 35-40W, so the Wii U will be 2 Wiis duct taped together.

I think the Wii was considered to be about 8% of the 360.

Those consoles could very well be 4-8 times as strong as the Wii U. Maybe a 100 or 1.000 times stronger. It doesn't make a difference to me.

Whilst true, it has nothing to do with the actual 'power' of the console.

You got me though, well done.

So the Wii is weaker than the PSone then.

A console with roughly the same technology which consoles twice as much power will roughly speaking be twice as powerful.

A console which uses technology twice as good but uses the same quantity of power will roughly speaking be twice as powerful.

http://en.wikipedia.org/wiki/Southern_Islands_(GPU_family)

Like for instance the HD 7770 is half as powerful as the HD 7870 and it uses half as much power, roughly speaking. If you know the power consumption and the rough technology of something then you can make a good guess as to what kind of performance to expect.