Microsoft gave up on Windows RT to go back to the drawing board and build Windows on ARM. It's the same with phones: they gave up on Windows Phone so that they can have a "Surface Phone" do-over in the future. This allows them to introduce hot "new" products rather than updated versions of failed products. There are many examples of Microsoft doing this.
I thought it was supposed to be for phones. That's what I read last year: "I'm hearing this Cobalt [x86-on-ARM] technology is aimed at phone and possibly tablet/desktop devices." [1] I'm confused when it became a laptop thing at all.
It's always been something of a laptop thing? Microsoft since Windows 8 has made it somewhat clear they think Windows needs a strong presence on ARM tablets to A) avoid Intel hegemony, B) remain competitive with the iPad in that space. "It doesn't run any of my apps," was perhaps the biggest complaint about Windows 8 ARM tablets, so it makes sense that x86-on-ARM was a big strategy push before the next attempt.
Beyond that, rumor has it that Microsoft hopes selling tablets/laptops with ARM will open the Windows ARM space enough in the meantime while the Windows team is finishing the next version of key Windows shell components (nicknamed the "Composable Shell" or CShell), which would be make the Continuum experience for say Phones stronger because instead of switching entirely different shell applications (start menu, taskbar, et al) between form factors, the same applications responsively adapt themselves.
I'm confused, I just quoted an article from 2016 saying it was about phones and possibly tablets/desktops, and you say it's always been a laptop thing? Anything you can quote from 2016 to that effect?
The Verge's article from 2016 says "laptops are expected to be the first devices", and brings up Windows RT as the predecessor, just as I mentioned it:
Possibly, but they have not given up on Windows. They came out with Linux for Windows. I can see them coming out with something like Windows for Android - a compatibility layer allowing e.g. Office for Windows ARM to run on Android phones.
Unfortunately, it seems like Microsoft has given up on Windows Phone already.