Unlike xCloud, Microsoft's Xbox Console Streaming service requires you to have the game of your choice installed on your console as it works on the basis of local streaming in the comfort of your own home. Think of it as a similar to a Switch, in that if someone plonks themselves down and takes over the telly, you can still play your game without being booted off completely.
You'll also need to be an Xbox Insider, as well as being registered for Xbox One Update Preview rings. On the device side of things, you'll need an Android smartphone or tablet running Android 6.0 or higher with the Xbox Game Streaming app installed. And we're not quite one yet; you will, of course, need an account that you sign in with and a Bluetooth-enabled Xbox One wireless controller. So if you can tick all of those boxes, have at it!
Anyone can sign up for those two preview programs, so don't fret if you're not currently a member. The title selection also includes Xbox Game Pass titles, and while Microsoft also recommends a controller mount for players using their phones, it's not a requirement. Quite obviously.