Sony announced today the service end date of the PlayStation Now for the PS Vita, Vita TV, BRAVIA and Sony Blu-ray player owners. You can enjoy the service until August 15, 2017 in Japan but after that you can use it only on PlayStation 4.

PlayStation Now is a game streaming service which allows you to play with PlayStation 3 games on other Sony devices without download / buying it. You can just stream and play (of course the service is not free.