In the old version, I used to be able to do a "clean" screenshare, which would remove the windows bar from the bottom of the screen and the tabs from the top of the browser. It's very odd to me that they would make the decision to remove that feature in the new version. Our company has a browser-based product, so when I am doing training sessions or webinars for customers, it would be really nice if I could make it so that they are only viewing the web application, and not the rest of my browser. I may switch back to the old version, but I think I read somewhere that the old version will no longer be available later this year.
moderator edit: Title for clarity