The duration of a game rental is not specified in the image. In addition to individual game rentals, Sony will offer a Netflix-style subscription package, though the image today does not mention subscription plans. Sony has yet to officially announce pricing information for PlayStation Now and the company has not commented on today's report.
It is possible that the image posted on Gaikai's website is nothing more than a mockup of what the PlayStation Now user interface could look like.
PlayStation Now will go live in North America this summer for the PlayStation 4 and PlayStation 3. Support for the PlayStation Vita, as well as Bravia TVs and smartphones and tablets, will come later.