PlayStation Now already has a closed beta running for PlayStation 3 users. Tomorrow, May 20, the beta will kick off for PlayStation 4 gamers. According to the PlayStation Blog, if you already registered you should keep an eye on your Inbox for an invite and voucher code starting tomorrow.

In addition, Sony is opening up the PlayStation 3 beta for the service to a wider audience tomorrow.
PS Now gives you the freedom to play select PS3 games like you already stream movies, TV, shows, and music – directly to your favorite PS Now compatible devices without any discs or downloads. The first supported devices launching in 2014 are PS4, PS3, select 2014 Bravia TVs, and PlayStation Vita, with more devices down the road.

We are also happy to announce that access to the PS3 Private Beta program will expand to a broader audience in the near future. If you aren’t a member of our Private Beta community yet, click here to register your interest. Please be patient if you’ve already registered but haven’t received an invitation yet. We are inviting more Private Beta testers on a regular basis.