I would like to be able to add multiple maps to a window and have all of them rendering content independently and simultaneously. User input goes to the active map (control). They would have to click on another map (or perhaps through winset calls)to give it focus which would then allow control.

If someone wanted to make it so control could be had over multiple maps, they could just override user inputs and send actions to both windows. Which means it should be possible to not have a default map.

An example would be:
4 maps in one window.
Each map contains an AI which walks randomly
The camera is locked to each NPC
3 NPC's are on the same large map and occasionally they run into one another. When this happens, all maps involved will display the same thing except from that NPC's point of view.
The 4th NPC is wandering around on another map and never runs into the other characters.

I honestly don't know the ramifications of this request. My primary concern would be with performance. It would do me no good to have multiple maps if performance was tanked.