Not really since every PS4 game is capable of streaming on PSNow. A technical capability is not the same as a service offering. MS hasn't actually detailed the latter.
Project XCloud will be shown at GDC.
https://schedule.gdconf.com/session/project-xcloud-the-future-of-streaming-cloud-aware-xbox-games-on-mobile-devices-and-beyond-presented-by-microsoft/865431
imo, this is a fairly big step up over other streaming services which have curated libraries.
I still remember the first time I used Binks video was for a 20 min Half Life 2 demo which legitimately blown me away :).
But this rumored Google console is news to me! Can it take on the big boys tho?