Stadia - Google's vision for the future of gaming

I’m more concerned about turning all of gaming into a service. If it’s just about the time spent on a particular game and all games are vying for your $10/month, where does that leave concise, single player experiences? Or single player in general? It seems like it benefits the massive AAA behemoths at the cost of everyone else, making this even more of a winner-takes-all industry.