Definitely PS3. One of the worst launches ever. Sony was coming off an absolutely dominant generation with PS2 and botched it up to fall way behind. They sold the system at too high a price, lost over 50% of their market share, lost money on the system, lost most of their 3rd party exclusives. And as bad as Wii U has been selling, PS3 sold worse.
Wii U had a decent launch, but has flatlined brutally. But, it's still better off than the launch of either PS3 or XBox 360. At the rate it's currently trending it will fall to worse than those, but it also had two months without new games so it may pick up again with new titles. The real thing is with Wii U is that it's launch is more like 360. It's the first out of the gate, it's competing with cheaper last-gen systems and it has some growing pains to work out. But it's doing so before the competition launches, which is the key. PS3 was launching from behind from the get-go.
