Earlier quoted context omitted.
The good news: you can watch practically all sessions on youtube: https://youtube.com/user/mediacccde/playlists
While this is nice if you are just interested in some of the talks it's not really a substitute for being there, meeting people and taking in the atmosphere (for me at least. There's a lot of things you don't see in the streams, like the venue, the tents and all the small cool things in the assembly area.
So I might be worth it for people who haven't experienced that sort of thing. But otherwise I would recommend watching online with some friends and travelling someplace else for new experiences.