It has an achievement system (a la xbox achievements), and when you get points for doing in game things you can use those points to buy special DLC / bonus content. (reddit.com)
This for the most part wont concern your everyday consumer but for knowledgeable dedicated gamers things like this can be a deal breaker. (gamechup.com)
If you're into the digital card game thing (I'm not) then you're probably pretty excited for this one (I'm not). (coin-drop.com)