In favour of Sony? I'm a PC gamer. Good job there.
I'm not sure why anyone has brought up the PS2...My point is if SSBB sold to only ~12% of Wii owners, what makes anyone think that it will suddenly cause an increase in Wii U sales? The figures just don't add up.
the other question is, why wouldn't it? it depends on how they are marketing it, how it looks like, how it plays. that's the same as why sony makes killzone 4 when the attach rate isn't so good imo. it's a franchise well known. known things sell better then completely new ones. and common sense should tell you that a new game increases automatically hardware sales a bit.
you are a fool if you think first party games on a Nintendo system don't have an impact on hardware sales. the attach rate could be even worse and they would still have an impact. 10 million potential buyers are 10 million potential buyers. the attach rate doesn't matter.
doesn't change the fact that games sell hardware. its not the other way around. nobody buys a console without games that interest him. The playstation series is an exception. sony always relied on optical formats to sell their consoles.