The most popular digital game store on PC is current Steam. The happened for many reasons, including the great Sales that you and find, trusted platform, and many features that Steam has built,
But being glued to you desktop isn't always optimal, so Steam offers a feature called Steam Link. You can down the app on your phone or smart TV, and have your game steam the picture, audio and controls to your device over wifi or Ethernet.
For best results, you need a strong wifi connection such as a wired connection or a 5GHz or or Wired Ethernet. Personally I am using some powerline Ethernet adapters, such sends internet through my own home power lines. It is less optimal than Ethernet, but provides a nice stable internet.
