I am not enthusiastic about Google Stadia's chances.
Google says you'll need 35Mbps to play at maximum settings—that's 4K resolution, high dynamic range (HDR), and 60 frames per second (fps) with 5.1 surround sound. As PC Gamer noted last week, that adds up to 15.75GB per hour, which would use up an entire 1TB monthly data allotment in 65 hours of game time.
Stadia will work at lower resolutions, with Google recommending 20Mbps for 1080p/60fps with 5.1 surround sound, and 10Mbps for 720p/60fps with stereo sound. That's 9GB and 4.5GB per hour, respectively, potentially using up a 1TB data cap in 114 or 228 hours.