That is what I see looking off into the Road maps, and what technologies will be available by the end of 2019. Will Sony or Microsoft take a stab at it? Probably not, but I really hope they do. I think the market would go absolutely crazy at the idea of having Call of Duty, Battlefield, Grand Theft Auto, Assasin's Creed, Gran Turismo, Uncharted, The Last of Us, Halo, Gears, and Fozra/Horion all available on the go, with no compromise. But, that's just my thought's. At any rate, I look forward to what 7nm fabrication brings us, and where things go with Sony and Microsoft, whether it is Home, Mobile, both, or otherwise. It's all about gaming first hardware, and that is what I love.
Aside from you obvious lack of understanding of hardware that makes your speculation of what Sony/AMD/whoever can make with existing hardware at an affordable price point hilariously out of touch, Sony has already made handheld game consoles featuring most of the franchises you listed, and people didn't go "absolutely crazy" for it. They made those "compromises" because as it turns out, making a handheld necessitates making compromises. Do you think Nintendo released a $299 Switch that struggles to play PS4 ports and only gets 3 hours battery life out of demanding titles for funsies? Sorry, there's no way in 2018 or 2019 to make a handheld for under $300 that can play Uncharted 4 "without compromise". The technology isn't there, and you're going to have to deal with it.
I also think it's hilarious that you claim to love "gaming first hardware" but still berate Nintendo for not releasing a Switch that's capable of connecting with cell phone networks and make phone calls. Which is it?