Can you explain the multiplayer feastures? will this be online and offline? cross platform? will there be a 4 player local mode / splitscreen for the ouya?

and also as a guy at reddit.com/r/ouya pointed out: Great EXCEPT I have no interest in a desktop version.
So I can fund $10 for a PC or Mac version
OR $16 for the OUYA version and PC and Mac.
Should be PC or Mac version or OUYA