PlayStation Now (PS Now) is the first-ever game streaming service available on a game console, where you can quickly access a rich and expanding library of PlayStation 3 (PS3) games from Sony's cloud servers. Since January, PS Now has been in Private Beta for select gamers across the country, and the Open Beta will be available to all PlayStation 4 (PS4) owners in the U.S. and Canada starting tomorrow.
As part of this Open Beta, PS4 users will see PS Now titles fully integrated into PlayStation Store, available to be streamed for various rental durations. Check out the video walkthrough of how it all works:
During the PS Now Open Beta, PS4 users will see a diverse library of more than 100 titles to rent, with more added regularly. PS Now will offer a variety of rental periods depending on the game, including 7-days, 30-days or 90-days, as well as a short 4-hour duration, so players can sample the experience first.
Source: Playstation Blog