Welcome to the Darkside
What's next, an inbuilt TOR client, a inbuilt bittorent client and just to top it of live porn feed. All you need to do is fill up your Bitcoin wallet from an accredited MS Bitcoin provider....
Sarcasm aside, I am extremely surprised to see MS taking this so seriously. What I don't understand is how they, MS , Apple or Google etc will ensure the stability of Bitcoin. When dealing with illegal drugs, guns or whatever that was being sold on the Silk Road is one thing, if you get ripped off then it's your own fault, but when we are talking about a major software house/shiny shiny maker or Googletastic Google then the games changes quite a bit ( pun intended).
This week a game will cost your 0.2 bitcoins, next week 0.8 bitcoins and then the week after back to 0.4 bitcoins. How will they stop the Yoyo effect or don't they care.