I hate that I have to ask this, but do these ship with locked bootloaders? If they don't, they might be a candidate for beautiful Hackintoshes or Linux laptops. I just can't bring myself to run something that isn't unix under the hood and OSX has been a pretty decent balance of openness/unixness/ecosystem with a pretty nice looking UI and a thriving software market. I haven't tried Windows 10, but I suspect I'd be just as unhappy with it as I was with Windows 9 on a Surface.
I'm still a fan of the MacBook hardware, but a detachable screen is something you just won't see out of the Apple camp. I would love to have a laptop that converts into a tablet for light use/presentation/travel. A Hackintosh would be ideal, but I'd easily consider a Linux distro if it meant I could use something like this.
It didn't ship with USB-C ports (shame), but it sounds like you might be able to buy an upgraded "bottom" and take advantage of that when it ships (that's huge!):
http://thenextweb.com/microsoft/2015/10/23/surface-book-user...