I think MS just wants to buy access to the next generation of gamers. Minecraft is the King of the schoolyard and playground. Now that Nintendo is not converting people into gamers MS will grab the opportunity with Minecraft. Making Shenmue 3 will not get you relevancy with the new audiences, as much as I would love that game.
If the PS4 vs X1 situation has taught us anything, it's that goodwill can do a lot for a company. Of course it's not only that, but a good chunck of PS4's success comes from that.