[chrismorgan]

That will depend a little on the window management techniques employed. For me, it works very well, and I would actually consider a seamless blend of the two displays to be a slight regression, given Windows’ automatic snap behaviour or i3-like layout.

But I’m with you on the resolution matter. My external displays are nowhere near as pleasant to read from and use as my internal display—yet it was I that chose the two rather than one 5K or similar display. Bear in mind too, especially when dealing with laptops, that that not all hardware will be capable of driving multiple high-DPI displays. If I recall correctly, two 4K displays is supported by the Surface Book + Surface Dock, but only at 30fps. (I have the vague, unfounded impression that most laptops wouldn’t support it at all.)