I was pleased, and a little surprised, to find out that TeamViewer hosts multiple logins. That is, if I connect from my computer to a remote computer, someone else can also connect to the same remote computer at the same time with their own computer. What's more, on the remote machine screen everyone sees, everyone sees multiple cursors, one for each machine it is connected to. That is, you're not all fighting for one cursor. So one can do a "conference call" on the screen, where the same remote screen is displayed, and controlled independently, from several computers. You can use your cursor to point things out to people so connected. I guess it would be nice if the cursors were distinguishable. As in, Joe has a cursor that looks like this, and Patty has a cursor that looks different. But they are all the same. No biggie.
I assume everyone knows about this, but it was a bit of a surprise to me.