It's not a hotkey when you have to look down at your keyboard and search for the right key, leave your hand off your trackpad, and move your other hand out of the way to press a non-tactile button. It's 10 times easier to just click a button or a key on the keyboard. Other manufacturers thought this was a "cool" idea as well, but in practice it was horrible, and it hurt sales so much that you don't see a single laptop on the market that has this dumbass idea anymore.
I was a sucker and bought one of those, thinking what a cool idea. It wasn't... I hated it and clearly so did everyone else who used it.
Yea but were they touchscreen surfaces? I don't think so from experience. I had a laptop with finger print sensor, never used that dam thing. Why? Well I didn't know how and if it meant looking up the utilities/control panel I didn't care so much, same with the samsung finger print scanner really poor in comparison to the Apple implementation which I used straight away and really appreciated.
Think of it like a slice of iPad if you will. It may also save space and leave more room for other things. I understand tactility and UI and UX, muscle memory and anyone who plays an instrument knows all about it, the fretless base is not that popular but a lot of
pro's make sweet sounds with 'em... but perhaps we're all visualising it differently and I am happy not two allow badly designed laptops of the past taint my expectation that Apple might make a really good job of it if that's what they decide to do.
Here's a thing, when I use my laptop I often balance it so the the keyboard is 45 deg and the screen at a perpendicular angle to my eyes. In this instance an OLED touch strip at the top for controls etc would be very nice.
The examples pictured and ones I can think of are basically labelled trackpad like surface from the past. I agree that's a crap implementation. There are things that can be done to glass to give positional feedback.
Now imagine this, you what to raise or lower the volume? Now you can simply slide you finger left or right across this touchscreen strip/panel, but not across the main screen. A basic function give precision touch functionality but is more comfortable at that angle, you main screen remain hand grease free.
If it's not there I won't lose sleep either.