Was just thinking about this yesterday. Since the number of windows is limited right now, being able to relocate my tabs to where they're most useful would be very helpful. I've found that I tend to work with a primary window right in front of me and an "accessory" screen to my right or left where I can ignore it until I need it for something.

We have partially implemented this. You can now drag tabs out of a window to make a new window from that tab.

This would be a great addition