When I see headlines and webpages like this, I am instantly turned off. I know I'm in a minority spot, but there are conflicting claims.
Screen-sharing and plugin-free are not compatible. This is webpage-sharing or DOM-sharing. A very cool take on this, but until I read the comments here, I was scouring your site for that detail. You don't need to hide it, or call it "DOM-sharing", but something.
Even just a screenshot example... your "learn more" page has everything but a shot of it in action.