I wonder if this is where Apple are going to end up with their touch bar. At least you won't need to worry about dust killing your keyboard.
It would take me a while to get used to having to press a button to show the trackpad like on the Yoga Book. I like that it automatically hides when typing, but constantly having to bring it back up, to scroll in a small textarea for example, would be annoying.
Merging the touchbar and trackpad, kind of like that Asus laptop that came out recently would be interesting. I thought it would be awkward at first but a lot of reviewers seem to think it's useful.