Co-Founder of nReduce & Proven.com
To find out how to describe your use case, I would get real users to use your product, then ask them "How would you describe this product to others" or "If you were to recommend this to a friend, when would you recommend a friend used this?"
Do this with 10 pairs of people (one presenting and one watching) and ask them the above questions. I guarantee that you will learn the answer to your question.
For me as a user, your landing page is confusing to me. When reading at the top I was assuming this was to be used when two people are meeting remotely, kind of like a skype + screen share replacement. Then in your graphics you show two people standing next to each other. So I would be talking to my co worker and also controlling her screen.
As this is in Lean section : what is your value hypothesis?