That it's now accepted to pay $60 for a service instead of a product in gaming. A service they can shut down whenever they want (e.g. when the customer refuses to be ripped off by the DLC anymore). The cities created by the players could (or probably will) be lost. For some games like MMOs this is normal. For simulation games it was not.

Tell me one game with always-online DRM where the makers shut it down and people lost their content.