You are right. I am a gamer and have been looking forward to this feature. But I am a small minority. I can't believe I'm going to be looking into what android tablet to buy. I've been an Apple fanboy for a decade, so I don't even have any idea where to start.

I would have rather bought the next iPad instead. Gaming is a big hobby for me, but not for most people, so I understand everyone's 'too bad, go with android then' attitude towards me.
As for the mobile experience you raised - There is surprisingly low latency for the streaming services with a good download and upload connection. I don't plan on playing a full game on mobile, but some games (like Destiny 2) have some grinding or casual things to do that can be done here and there when I have some free time, and a phone would be perfectly fine, especially when precision isn't the most important thing. A PS4 or xbox controller with a phone grip works great this way, I wouldn't use the touch screen myself.