Very interesting idea. They absolutely have the current user base and money to take on Steam, but far from the games. Also, another problem about taking on Steam is this the fact that we already own all the games. Go look at your Steam library, and think about what other games do you want. Chances are that Steam already has those games you still want to own. So the biggest problem is that Steam already has all your games, and Steam have all the games you want, so it would take something really special to lure people away from the platform.
