The Android game play store has added an instant try now game area which allows you to try a game without installing it.
The game downloads only a portion of gameplay so you can get a feel of how it plays.
You click on the TRY NOW button and the Android game downloads temporarily without installing on your Android mobile phone.
The feature is handy when you can try the game without having to uninstall it, plus you arent downloading the whole game just to check it out.
Definitely more of a feature for Android game developers than for Android game players since it allows more players to experience a game developers vision with no risk.
Popular titles like Clash Royale, Words with Friends, Bubble Witch and Final Fantasy are some of the first try now games to appear and Im sure we will see many more.