Yeah, it's Pikmin.
Pikmin 3 is probably the most stunning game on the show floor on Wii U with its wonderful cartoony yet photo-realistic art style. The game itself, while familiar, is very fun.
There were two demo segments shown at E3 2012. One was a Challenge Level where the goal was to collect as much fruit as possible in certain amount of time. The game played like Pikmin from there, as you had access to Red and Rock Pikmin to take out obstacles and bring back fruit to your ship. The rock Pikmin are new, and have more attack power.
The coolest thing that I noticed about that mode was the replay that was available at the end. You could watch a replay of your entire playthrough, allowing you to devise a new plan of attack to be more efficient and get a higher score. The replay was even cooler because you could watch it on the TV while looking at all the movement done on the larger map on the Wii U GamePad. You could also easily rewind, fast forward, pause, and more on the touch screen.
The second demo was a boss battle, where you faced a rock snake-looking thing. To defeat him, you had to throw rock Pikmin at his outer shell, and then when his gooey innards were exposed, you were best off chucking some Reds in because they would cling to him and keep attacking when he moved around the arena.
The one disappointment to me with the whole demo was the GamePad controls. Compared to the Wii Remote and Nunchuk setup, the GamePad controls were pitiful. Things like throwing Pikmin were oddly mapped to the face buttons instead of the triggers, and there was a distinct lack of precision in throwing your Pikmin. It is possible that a customization option could fix the issues, but I doubt I will spend much time working that out, because the Wii Remote and Nunchuk setup is wonderful.
The latest entry in the mostly dormant series doesn't have anything amazing presented in this demo, but it is a damn fine rendition of the Pikmin gameplay, which is wonderful.
Pikmin 3 is set for a launch window release for Wii U.