If I'm reading the FAQ correctly you need the founders edition to even play this year and the free stream is only 1080p/30fps, this is a no from me. Must be minimun 60fps for me to even try it. This is the swedish FAQ don't know if different in other countries.
www.stadia.com/faq
6x master league achiever in starcraft2
Beaten Sigrun on God of war mode
Beaten DOOM ultra-nightmare with NO endless ammo-rune, 2x super shotgun and no decoys on ps4 pro.
1-0 against Grubby in Wc3 frozen throne ladder!!