On That Touch MacBook Pro
"It gives great demo! But after a short period of time, you start to fatigue, and after an extended period of time, your arm wants to fall off. It doesn't work. It's ergonomically terrible. Touch surfaces want to be horizontal."
That first part about giving great demo is very much foreshadowing. We'll come back to that later.
In addition to having a number of touch-enabled laptops, I've had a number of touch-enabled all-in-ones and those were much the same from an ergonomic standpoint and also just as bad. Hell, I have one as my garage computer as we speak (from when these machines were hot shit back in 2012-2013, really a testament to how hard computing has plateaued). You'd think I'd enjoy having a touch machine there so I can keep my workbench clear of a traditional mouse and keeb, but nope. Trying to actuate the touchscreen is an ergonomics nightmare.
The only use case I ever found that worked was having such a machine as a big, bulky media player in the kitchen, where you're not touching it all that much, just enough to queue up music/YouTube/what have you. Otherwise my upper arm just hurts trying to use these things like I would, say, my phone.
Much like I implied with the TouchSmart example in the opening, however, this didn't apply to those 2-in-1 laptops that were hot shit back in the Windows 8 days (and now seem to have all but died off save for the Surface line of devices), mostly because you could fold the display over and bam, now you have a thick but otherwise somewhat normal tablet form factor.
The MacBook does none of these things. It's not a convertible. It's just a traditional laptop, but with touch bolted on. It does nothing exciting with it. I've seen people already saying "this will be great for creative apps like Final Cut!" but just trying to mock up that movement on my boring, old, probably-soon-to-be-deprecated MacBook, it just makes my arm hurt.
There's also the question of how will macOS respond to this kind of hardware? macOS is first and foremost a desktop operating system. It doesn't expect touch. Interface elements aren't designed for fingers. Microsoft tried--and failed--to address this with Windows 8 by forcing tablet interface paradigms down everyone's throats, and that went over like a lead balloon.
Windows 10 went with more of a hybrid interface that adjusts to what you're using, but given where Apple's software quality has been as of late (macOS 27 has been a shitshow for me personally, same as several others) I really don't trust that they could pull off something like this without mucking it up somehow.
But even if they did, you can't fix how much of an ergonomic nightmare this is with software. But again, maybe I'm just built different.