So you admit it then, Sony focus on making a system for third parties (multi plats, incidentally) while Nintendo only (seems) to look at improving THEIR games and hoping to snag some third party support if it comes at all. Personally, I want Nintendo to KEEP exclusives while producing hardware that will have people say, "Wow, about the same game, similar potential, same multi plats, but also those games I grew up on." We all know nothing will likely change from what Foxi4 pointed out. Nintendo is hell bent on it, and really I don't care. Keep making Metroid/Zelda/Mario and I will keep playing my backups;-)You're conveniently forgetting about the part where Nintendo has been in the video game industry since Generation 2 (in the west since Generation 3) while Sony entered the market during Generation 5 - their long-term franchises obviously have higher sales because they've been on the market for at least 10 years longer.
Not only that, Sony's focus was never first-party development - they focus on manufacturing hardware relevant to third-parties while Nintendo creates "systems that play their games, not games that play on their systems" which is painfuly apparent in the case of the Wii, the DS and the Wii U.