You would have to turn on your Xbox One Console or put it in the Instant-on mode.
There are currently only a few games available with more to come over time. With this Xbox Game Streaming app, you can also stream all your Xbox One games installed on your console! With a strong WiFi or cellular network connection, you’re good to go! You can make use of an Xbox Wireless Controller and connect with Bluetooth. Download Xbox Game Streaming and enjoy the creativity of Microsoft’s new Project xCloud (Preview).
This online gaming app is developed and published by Microsoft Corporation and is available for downloads on Android devices. Xbox Game Streaming on PC is a gaming app where you can find and play famous Xbox games all in one place! Get ready to have the fun of your life with game titles such as Sea of Thieves, Gear 5, and lots more!