Yes only Pro supports it and yes you need to buy a license to use it. You do not need to edit osb..xml for projecting the website. However as I said you cannot enter any input to the website. What are you trying to accomplish exactly? Perhaps if you tell us that, we can help.
As an FYI, we also offer a cloud based web browser that is streamed to TV as a video. In this case we also support input via mobile apps. This is not sold directly to consumers however.