The refresh rate isn't amazing, so you won't be sharing any video with this method, but you could use it for presentations, or just sharing what you're looking at. In class I used it to share a presentation from my laptop to the desktop computer that was hooked up to the projector. There was about a 5 second lag in refreshing, so again, animations would be affected, but not simply content sharing.
I would suggest having students use it to quickly share what they have on their laptops with the class without having to have them come and plug their computers into the projector. You could simply have them all share and then switch between view, especially if you open them up in multiple tabs.
Might also be a way to keep track of what their working on! I could imagine asking a student who is not on task to share their screen with me so that I could periodically check in on them and they wouldn't be able to alt-tab out of a program to hide it from me!