How did Sony turn the PS3 around but Nintendo couldn't do the same with Wii U?

[Jranation]

Maybe Nintendo thought they can make another "Wii" - with just new stuff.

Sadly, they didnt realize that like 80% of the casuals who bought the wii moved on.
BUT!! They did it with the 3DS - but it only sold like 1/3 of what the DS done.

Wii U - Gamepad
3DS - 3D