It seems that Sony may be adding a Downloading in PlayStation Now app. On the above photo you can see Alpha Protocol being played via PlayStation Now and in the menu there is an option to download. This is special, since the PS4 has no emulator and therefore a download option would have little sense according to that theory.
Downloading in PlayStation Now
It is possible that Sony has succeeded in making assets or something similar downloadable or maybe even the entire game. The screenshot above comes from Reddit where a user announced that he had never seen the option before.
For the time being, selecting and activating the menu option did nothing, but perhaps it is a sign for what is to come.