Just PC and Wii U? Come on, you can get it on PS3 and XBLA too. I don't know how to feel about it being episodic. Sure Walking Dead was awesome, but telltale missed the mark a few times.
Also, all depends on how much they are charging for one episode. And 1.5 mil? Good luck with that.
Port begging this early?
Though, if they truly intend for this show next gen levels of fidelity like the video demonstrated, then putting it on the PS3 and XBLA would require to much downscaling.