The problem with the touchpad is suppose I want to scroll. I have to carefully position the mouse over the scroll bar. Then click, or click and drag, whatever, which is just freaking awkward with a touchpad. (It's no issue with a mouse.) Yeah, I know that the right side of some touch pads acts as a scroll bar. But that depends on the right window being the "top" and I often get that behavior mixed up with the other regions of the touchpad. I also have problems with accidentally brushing my palm over the touch pad and "what the hell just happened".

With a touch screen, this all becomes natural and trivial.

I know, I see people using touchpads all the time like it was an extension of their hand, and they have no issues with it.

But I do. I like that touchscreen for my laptop. It is transformative. No other word for it.

As for a desktop with a big display, I don't need a touchscreen except for one case - where you are working with someone and are both hovering over the screen. The touchscreen is real handy for that rather than passing the mouse back and forth.