My S series has a Display Port out, so you can attach to a monitor at 2560x1440. And yes, the Infiniium s/w has multiple window support, so you can have different windows on each display
. The trouble with an external monitor, is that it's not quite in the position you want it and there's no touch screen support.
Yep, you do run other s/w on it, which is why a higher res is useful, so you can see multiple things at the same time.
They do now ship with Win10. But with regards to scaling, even Full HD, which wouldn't need scaling, would be a welcome improvement on 1024x768.