What to expect: Imagine how good it would be to pick a game in the Google Play Store instead of waiting for it to fully load and be able to play it in seconds, no matter the size. It's possible that this will be possible in Android 12 thanks to the upcoming "Upload as download" feature, which uses Google's internal broadcast technology.
The new game streaming technology was announced during an Android developer talk hosted by Greg Hartrell, Google's Director of Product Management. Upload as you download uses the smart background download system implemented at the bottom of Google, which means that developers won't have to do anything to take advantage of this feature. The user launches and runs a game much faster than using traditional methods. The background loading system loads assets to be loaded first, based on data collected on "typical first gameplay experiences, including memory access patterns". In the example given, a 400MB game is ready to run after 10 seconds. Hartel also states that when the game ends, the game process does not stop, but all this is done in the background.