Some use cases would be:
a. QA recording bugs instead of writing tedious instructions for repo, since you can use the inspector on the recording.
b. Developers making changes instantly showing it to multiple people.
c. Office food ordering - one person signed in, send the link around and people can pick their hard to pronounced Thai food.
d. Collaborative travel planning
e. Pair programming with an online editor of your choice
A sample recording of us using it on Codeacademy http://www.sgrbx.io/#/play/sHMVrO1jg8
We are currently in beta, look forward to your feedback!