PlayStation Now will enter a PlayStation 4 private beta tomorrow, May 20 according to Sony. Up until now, PlayStation Now has only been available on the PlayStation 3 and according to Sony, private beta testers have logged over 50,000 hours of gameplay. The service allows gamers to play select PlayStation 3 games directly to PlayStation Now compatible devices without any discs or downloads. In addition, Sony announced that the PlayStation 3 private beta program will expand to a broader audience in the near future.
PlayStation Now was originally announced in January and will launch this year for the PlayStation 3, PlayStation 4, PlayStation Vita and select 2014 Bravia TVs.
Source: PlayStation Blog