The PlayStation Now beta is underway for some PS4 owners, but Remote Play is not possible.
DualShockers has reported that Remote Play cannot be used when using PlayStation Now on PS4. It’s a beta so it’s possible it might be available on actual launch. Some people have noted PlayStation Now will be available for the PS Vita anyway so Remote Play isn’t needed.
Splitscreen gameplay is still playable on PlayStation Now. This is a cool option if you wanted to play some offline multiplayer modes of some old PS3 classics.