Overall it's a nice option, I don't use my touchscreen as the primary method, but when I'm on the go, its nice to have. I think many people here could leverage the use of it, at times, but it wouldn't be the primary method of interacting with the OS..would you want Apple to release a Macbook Pro with a touchscreen?
Speaking of the OS, macOS isn't a touch-first operating system, and so there would need some significant work to make that happen. Just look at the pain users went through with windows 8, there was a lot of things wrong with win8, but MS had struggled with the touch-first UX to be sure.