The new app model does not require an installation process for an app or parts of it to work and has multiple potential uses.
The Google Play Store will now let users try apps before they buy them
Google is rolling out a Try Now button to test instant apps on the Play Store - news, abrir play store app
Google Play - Wikipedia
Google is rolling out a Try Now button to test instant apps on the Play Store - news, now play
Google upgrades Play app with Instant playing, Arcade mode - news
Android Instant Apps gives the Play Store a 'Try Now' button to test and use apps without installing - News
Google Is Testing a Redesign for Play Store App Listings « Android :: Gadget Hacks
Google is rolling out a Try Now button to test instant apps on the Play Store - news, now play
Google is rolling out a Try Now button to test instant apps on the Play Store - news, now play
Google Tests Its 'Privacy Sandbox' App Tracking Alternative on Android Phones
Google Play's Instant Apps 'Try It Now' feature lets users try out an app before installing it
Google is rolling out a Try Now button to test instant apps on the Play Store - news