About a year ago, Valve announced that it was building an application called Steam Link. It’d let you stream Steam games to your iOS or Android device, with a computer on your local network doing all of the heavy computation.
Then Valve submitted it to the iOS App Store and… Apple rejected it. At the time, Valve said that Apple pinned the rejection on “business conflicts”.
A year later, it seems said conflicts have finally been resolved. Steam Link for iOS just hit the App Store.
Because there’s no way most PC games would be fun on a touchscreen, you’ll probably want a controller — Valve says that Made for iPhone-certified controllers should work, as will its own Steam-branded controller. The company also notes that for best performance, the computer doing the streaming should be hardwired to your router, and your iOS device should be running on your WiFi network’s 5Ghz band.