This is a very cool idea. I see two main uses for this:
1. Testing and QA across multiple devices/browsers.
2. The bigger use I see is educational. Students and classrooms can have shared browsing experiences where the instructor can automatically open websites on their browser for them. Imagine a classroom where the instructor never has to say "navigate to www.google.com"
For the language classes that I take over Skype this would be especially useful if the teacher could start and stop the video stream (i.e. on a site like Youtube).
1. Testing and QA across multiple devices/browsers.
2. The bigger use I see is educational. Students and classrooms can have shared browsing experiences where the instructor can automatically open websites on their browser for them. Imagine a classroom where the instructor never has to say "navigate to www.google.com"