I sure hope this doesn't mean the end of the single player games
Not fully, but partially, it DOES. Obviously, this game will fail, just like most MMOs fail nowdays, because no one wants to pay $15 every month, short of a few people that have money to burn and will play MMOs for a few months before they get bored and quit.
Conan failed.. Warhammer failed.. Star Wars failed... D&D Online failed... This will fail too.
Once the game is bought, it should be yours forever, end of story. No if's or but's. Paying monthly for phone or cable is one thing, but paying monthly fees for a frigging GAME is ridiculous... If I already paid for a game once, there is no reason why I should pay again and again, and not be able to play if I stop paying.