The beta test does not have any of those requirements other than the fact you need an Android 6 phone or higher.
As for how successful game streaming is going to be in the long run... lets just say I forsee most casual gamers or on the go gamers choosing a game streaming subscription over owning additional hardware within the next 5 years.
I've actually had a chance to test out some of the services and was very pleasantly surprised, even on FPS titles.