I haven't heard of this type of conference before and I believe it is a very different concept. It can be beneficial for attendees and creates an organic sharing environment rather than the ordinary setup of any conference where hosts are on the stage and others are listening. It can be hard to start a conversation for some people at the beginning, but we can get used to it!
== The UnConference ==
I dig the "everyone is an expert" model of the unconference. I don't think it precludes the value of traditional conferences, but the world definitely needs more unconferences.
== Unconference ==
I found this concept very interesting, as academic and/or professional discussions can be made with different people in a passionate manner. Although some people do play the two feet away rule outside unconferences, it may feel disrespectful for both parties, for which this set rule may optimize engagement and learning. I think it would be a great idea to have these unconferences in addition to any traditional conference, as both are informative and have their own purpose.