Metro worked perfectly well on tablets. And every OS since W8 has actually kept some version of Metro (in the form of e.g. larger touch-targets), because having a single version of Windows UI for both touchscreen and mouse-and-keyboard computers, is what enabled the creation of the "2-in-1" or "convertible" touchscreen notebook, a design that basically every modern Windows notebook instantiates.
Liquid Glass also makes more sense on tablets. I think Apple is copying Microsoft because Apple is also moving toward full UI-level unification between their desktop mouse-and-keyboard UI and their mobile/tablet touchscreen UI. They've already done it for some apps (e.g. Notes.)
If you believe the rumor mill, Touch-enabled Macs may launch this year[1].
[1] https://www.macrumors.com/2026/03/08/apple-planning-macbook-...
MacBook Neo is getting a lot of attention for good reason. It is a great laptop. The fact that it isn't "convertible touchscreen" notebook doesn't seem to bother anyone.
Apple copying Microsoft is a mistake. It used to be the other way around.
The Windows 8 equivalent server edition also included the upgrade to Metro UI. I don't know, I guess MS figured IT wanted to provision Windows services using a surface tablet?
I actually really did like Windows Phones though. I can imagine a world with a third competitor in that space today... But MS didn't seem to have any understanding or ability to develop an ecosystem that works. Even when they were literally paying people to write apps for their app store, it was just terrible.