Anyway, making more games next-gen exclusives may make sense in theory, but in fact a current-gen AAA game can't possibly turn a profit if it's released onto a console that can't possibly have an install base over 1 or 2 million by Christmas, and that's if the system sells out 100%.
Square-Enix cried that Tomb Raider "only" sold 3 million+ copies. They're not going to release current AAA games exclusively onto a platform that would have to sell to 100% of its installed userbase to come close to breaking even.
This is also why nobody's making Wii U games. You'd have to sell to more than 25% of all Wii U owners to break 1 million copies.