With the Surface Book 2, you are getting the following:
An advanced MacBook Pro with 8th gen Intel processors and nVidia 1060 graphics with 6 GBs of video RAM
A 15 inch iPad
A keyboard thats nice to use
USB A, USB C (TB3), SD Card Reader
Cool Biometrics like the new iPhone X which unlocks your device
The fact that its not running macOS is neglible. The apps are what matter and last I checked: Adobe Creative Suite, Microsoft Office (the real stuff), AutoDesk, real QuickBooks and Quicken.
Of course, there are the little things in macOS I like - like previewing files, batch editing, expose. Macs seems to have some magical power at power management. I left a VMWare session open with Windows 10 for a day and I was shocked when I logged in, it was logged in and only 15% battery used. Windows 10 is still perfect, but hopefully power throttling can fix that.
Windows 10 is really good too, you get tools to really experience the hot technologies now like mixed reality. I have been using Windows 10 since its launch I've had little problem with it except for its a bandwidth hog - but macOS is just as worse and you don't have anything built in to mitigate. At least Windows 10 has a metered connection option, you can pause updates and disable background apps. macOS, I had to pay $7 for Trip Mode.
Windows 10 has matured well, five releases have done wonders and I can only see it getting better. I provide support for it and I notice there are less complains than previous versions. SO, it likely means they are doing something right.
I love features like Task View, Snaps, being able to say Hey, Cortana - which song is playing, shutdown computer, whats the weather in xyz.
Apple has great hardware design as far my early 2015 MBP '13 goes, but it looks likes starting take a nose dive with the 2016 and '17 MBPs. I am considering taking a detour back to Windows 10 with these new SBs. I just wish they would have pushed for DDR4 to make it perfect. Those LPDDR4's are starting to sound like unicorns.