Assuming the PS 4 keeps it's lead (since there is no evidence to suggest otherwise) Who do you hope takes 2ed place this gen? Although it appeals to me to have Nintendo IPs come to Sony I don't think it would be good at all for the industry if Nintendo went the way of Sega.
I actually hope the Wii U does, although I've been hard on Nintendo in the past and think the Wiis motion controls were an abomination on gaming, they've since turned their back on the whole motion control thing (unlike Microsoft). Not to mention they do have a few nostalgic IPs I like and with the right innovation it could be good nostalgia and not the bad kind. The last time I think they showed any real innovation was with SMG 1.
I honestly wouldn't miss Microsofts IPs or feel bad for them in the least, not to mention if Nintendo turned themselves around a bit it might motivate some Sheep to come out from under hat rock they've been hiding under.