I guess the people who would want these laptops don't care too much about portability or battery life?
The segment of the population that requires a real GPU to get work done buys desktop replacement laptops and probably always will. Not everyone is a "digital nomad" or whatever. Sometimes you've just got to show a client a few tens of millions of polygons of art/CAD and you want to apply the finishing touches on the plane ride over cause you're way behind.
Though admittedly it's more likely to be a Dell Precision or a BOXX than this monstrosity I think there's more room in this market segment than you might think.
> I think there's more room in this market segment than you might think.
I have an external display that I bring along to try to bridge the gap in loss of productivity of working in annoying places, but it (asus mb168+) has garbage drivers (can't adjust brightness on OS X or windows 10; crashes OS X), which is why I'd even consider a native multi-screen device. I think there's more room in the "external displays that aren't terrible" market than the big/heavy performance desktop-replacement market.