Microsoft itself has some conflict of interests, where they use Linux in servers and work actively on Linux itself. And at the same time Microsoft wants to bring the Xbox brand to as many platforms as possible, as it is no longer the Xbox console that counts. So there should be an interest to make the games officially supported on a Linux platform.

On the other side however, they also want Windows to succeed. And not supporting a minority platform means huge savings in time and money and less complication in management. I am curious how Xbox gaming brand will handle Linux in the future.