If you want to 'get work done', sure you'd have to take Windows over iOS. But then Apple users would be reaching for a Macbook instead.
I get why people want 'both' from the Surface, but to an Apple user like me, Windows doesn't appeal for either use-case. I'll take macOS for work and iOS for casual use, and put up with separate devices for now.
I like iOS on my iPhone. I like OSX on my Macbook. The only thing I'm pushing back on is the idea that iOS (via the iPad Pro) is set to consume my Macbook.
Also I don't agree with 'over priced hardware'. I tend to find if you look for comparable hardware from other manufacturers the prices are similar (e.g. Samsung S8 vs iPhone, Dell XPS vs Macbook).
https://www.amazon.com/Dell-XPS-15-15-6-Inch-i7-6700HQ/dp/B0...
The screen resolution is much higher, they come with double the ram, not a "home OS" (whatever that is), and I'm not sure how an AMD 560m stacks up against an Nvidia 960m.
Not to say the MacBook will be cheaper, just pointing out discrepancies in your comparison.
Dell is $1,000 cheaper than a comparable MBP.
Edit typo contract-context
My mobile office has been reduced to a 12" iPad Pro with a 13" MB. All files are kept in iCloud and shared between the portable devices, a MBP, an iMac, and a custom PC.
The two portables together - inside a shared soft case with plastic protectors on each - weigh a lot less than my 15" 2015 MBP, and vastly less than a 17" Dell laptop I tried to use for a while. Having two big screens and one real keyboard is hugely more productive than trying to do everything on a single device.
The MBP gets hauled out for anything that needs more power or a bigger screen - not often in practice, because the battery life isn't anywhere close to being good enough for a full day of work.
I moved to this setup from the MBP about six months ago, and it's been a big step up in productivity. With two fairly light devices I can do almost anything I need to do almost anywhere. It's at least as productive for coding, research, and social as my old non-portable dual-screen Mac Mini setup from a few years ago.
It's not powerful enough for content creation, but that needs extra music hardware and bigger displays, and for now I'm happy to leave the tools for that at home.
As a bonus, the big iPad on its own is also the best ereader I've ever used.
Not to mention, the knife in a Swiss Army knife is going to be way worse than a similarly priced knife. There's a number of things you can do with a $60 knife you can't with a Swiss Army knife.
Majority of OS X users outside that UNIX crowd, barely know where the Terminal.app is located.
My Surface 3 came with support only for Chinese without even an English option. I had to buy and reinstall a totally different SKU to make it functional for me (and this was an employee purchase program, grumble).
I get what you are saying, but when iOS can manage to support more languages than Windows, well, we are in a totally different world these days.