Your comments

This can already be done. Simply join the session and select the 1st monitor. Then go back to Control webpage and open/join a second session and select the second monitor. 

I have actually made this work with 3 monitor sessions.

Be aware that you can drag windows up to the edge of the session you are on, but then you have to go to other session and pull it the rest of the way over.

Somewhat kludgey, but it works effectively.

The future is now, any progress on this? 

Would also like to have cc capability or multiple recipients capability on the email invitation.