I'd say your problems 1-3 can be summarized by saying you don't think there's a market for it. I don't think I agree. The prospective market for it is probably console gamers who want to play PC games that aren't ported to their console.
Even CP2077 might be an example of this, because from what I've heard the performance is absolutely terrible on consoles, and if you haven't already spent heavily on an upgraded computer with a graphics card that's going to set you back $1K, you probably can't play it there either. So if you're the stereotypical console gamer, who doesn't care about perfect graphics and the lowest possible latencies, Stadia is going to sound like a pretty decent deal.
And that's before you get to exclusives.