I've a SurfaceBook, I didn't think I'd use the touchscreen at all when in regular "laptop" mode. I end up using it _all the time_. It really is super intuitive to just reach up and touch the screen.
I have a laptop/tablet hybrid. My next device will not have a touchscreen, it's a waste of time on the windows ecosystem where most apps aren't touch friendly.
I've a feeling you're in the minority though. It's not that touch becomes the main method of interacting with Windows. It's that it becomes convenient for some things, particularly scrolling.
I have a laptop/tablet hybrid. Sadly it weighs too much for me to actually want to use it as a tablet. So I never use the touch screen, I have a wireless mouse that I use to scroll. Being touch is mostly annoying when people point at my screen and click things.
I still think the surface book is cool, but the weight factor is probably my biggest concern for the tablet mode.
You really miss it when you're switching between touch and non-touchscreens. You can't help but pointing at the screen only to realize: "Damn, this is not a touchscreen".
It's like that saying: Once you go touch, you never go back.