https://wccftech.com/xbox-controller-for-xcloud/

We’ve covered, at length, Microsoft and their move towards streaming over the cloud. xCloud, as the company has been happy to say, will be as good as their console offering, though not designed to replace it.

How true this will be is something that we will, eventually, find out. One challenge that needs to be conquered before playing console-style games on phones is the actual control of these games. Touchscreen controls are fine for certain types of games, but for the style of game that you find on consoles they are, frankly, useless. This is something that Microsoft is looking at, specifically with the development and eventual production of an Xbox controller designed for phones.