Earlier quoted context omitted.
It depends on your reference point, but IMHO there's no device right now that hits all the right point, so yes, Surface Pro is one of these flawwd machines. On the other side you'll have devices that feel really well built and graceful, but can actually do very little, or other ones fitting a very average vision of what a computer needs to do, and you'll be paying for additional devices to deal with the edge cases.
Imagine an iPad that automatically switches to MacOSX if plugged into an external monitor, keyboard/mouse. It'd be glorious, not that I'd ever happen - for multiple reasons. One of which being that ipadOS is essentially iOS, so no overlap with MacOS
I'd easily pay $3k for a top end version of such a device. I think this is Apple's main holdup - if the iPad can run macOS in this dual mode setup, the MacBook Air becomes pretty boring and a pretty bad deal. And they can no longer sell people two devices that accomplish the same task, only differentiated by one having a touchscreen.