Screen share multiple windows or monitors

I have multiple monitors, and I like to share what I'm doing. For instance:

• I'm a web developer, and I like to code live with some friends. My editor is on one monitor, and my browser is on another. It would be nice to share both windows simultaneously.
• I like to stream my audio player with a visualizer. Sometimes, however, I also want to stream something else as well.

Let me screenshare multiple windows and/or monitors at the same time.

You can technically already do this by running multiple clients and joining the same VC on all of them. It's quite tedious to do, however.