Question about Unity / game windowing limit

[MaxPeck]

So I work with a few complex simulators at work, both flight and ATC.  I was doing some simulation scenario programming on my ATC tower simulator and it occurred to me that outside of the main window, I have sub windows and app windows open all over the place.  Why can't we do this in Unity/KSP?  It would be helpful to be able to open up windows and then say, drag them to a second monitor, instead of everything being encapsulated within the KSP window, especially if you're using a mod like Alternate Resource Panel or MechJeb or KER.  It would be great to have to option to unclutter the flight display if we have the monitor real estate to do it.  Would this be implementable through a mod?  I don't really know what goes into something like this, I was just curious as I was dragging app windows around in the scenario designer and thinking "Man, this would be great if I could do this in KSP."

Thoughts?

[HebaruSan]

There have been mods to show telemetry data outside the game window, for example:

That one's not up to date, though, and it doesn't do everything you suggested such as handling MechJeb windows.

[MaxPeck]

Hm, it doesn't really though, it just lets you view some hand-picked data in a browser window.  What I mean is being able to actually drag windows outside of the KSP window.