In my opinion, it means new ways of knowledge sharing. That's a pity that the slides are so heavy in size, I think if you aim to gain a maximum of people coming in such sites, slides must be less heavy in size.

But anyway, it's good to know that such sites exist and I hope that improvements will be made in the near future to give access to maximum of people. To give a piece of advice, knowledge workers should care about the usability and access.