It seems this would either double the system weight (due to counterweights) or require an extra stand in the back.
A quick comparison, Microsoft cites 1.6 pounds as the weight. I'm assuming it's the screen only as the Surface 4 Pro (the tablet computer) alone is 1.73 pounds, and the Macbook Pro is 3.48 pounds. If the stand held the GPU, a battery pack, keyboard (and possible counterweights) and weighed as much as the screen, it'd be 3.2 pounds and still a fair bit lighter than the MBP.
Starting at 3.34 pounds (1,516 grams) including keyboard
my big worry with the MS hardware is its flimsy plasticky nature.
However, I suspect we're talking at cross-purposes here. I don't know about the Surface Book keyboard. I watched the webcast but have not had a hands-on....
I like to pull the keyboard off my surface 3 and lean it up against the wall and watch movies on it while still having mouse control from a distance.
What we really need is for every device to have an embedded Logitech controller so I no long need the usb nub dongle
http://www.technobuffalo.com/wp-content/uploads/2015/10/Micr...