For example, raising your arm to interact with a screen for any sustained period just doesn’t work ergonomically. In my experience, people who buy touchscreen-enabled laptops quickly loose the habit of using the touchscreen for exactly that reason.
It also makes the display look dirty. I expected Apple to pair this with some new coating or display technology that would reduce fingerprints and smudges, etc, but I’m not seeing anything like that either.
Overall I’m surprised Apple would add a whole new interaction model to the MacBook and barely explain why. Given how central UX has always been to Apple (they make a big deal of the mouse, the click wheel and multi-touch, etc.) That feels very... un-Apple.
I have not experienced that at all. I see people touch their touch-capable laptop screens all the time.
I don’t understand how people legitimately hold this belief that no one could or would use a laptop touchscreen. This is exactly how millions of people use their tablets every day. You hold it in your lap and you poke the screen. Or you use the stand to prop it up on a table and you poke at the screen. And shockingly, your arm doesn’t fall off.