I actually might be in the market for this, but even with the enticement of portable play, I see this having trouble competing with the regular $5 price point on Steam (and to a far greater extent than Skyrim).
I'm sure you would all rather have Red Dead Redemption, but I seem to recall that porting it to additional platforms is severely constrained by some PS3-specific optimizations buried deep in the code.
Anyway, if Nintendo wanted Rockstar aboard they really should have asked for Table Tennis.