3rd party support - but why?
Because Asymmetric Gameplay is a dud.
The Wii U says - 2 Screens are better than 1
The industry says - 1 Screen is better than 2.
Why is that? Because it takes too much brainpower, design, creativity, new risks, unknown territory, time, to make a groundbreaking Asymmetric game than a regular 1-screen T.V. game.
Asymmetric Play is already dead in the water for 3rd parties.
No 3rd parties are singing Asymmetric Gameplay's praises. It's already too difficult a financial environment for Dev's, they can't afford to take risks on Asym.