Gearbox president Randy Pitchford recently praised the Wii U gamepad as the "best for playing hardcore games".
Speaking to Joystiq Pitchford noted how the controller is "perfect for Aliens", with the additional functionality having the edge over other versions. He also draws comparisons with how these features can be applied to the Playstation 3/Vita or Microsoft SmartGlass, yet Nintendo's "committed themselves to this promise", and how it "wouldn't work as well with SmartGlass or with the crossplay between PS3 and Vita".
The link is direct, fast and immediate. Things like SmartGlass and Vita, they appreciate the value of the promise so they're making the promise. But they're not in with such commitment
Conceivably there's things you can do on all three without negative impact but because of Nintendo's commitment to it there are something's that could work there that just wouldn't work as well with SmartGlass or with the crossplay between PS3 and Vita.