Like Melanie, I've not heard of it before. The website in the link is pretty vague too.
I guess they're trying to gauge support before committing too many resources, which seems to me to be something of a paradox - I can't see much on the page by way of tantalising teasers to make me want to commit to an event I don't know much about on a date as yet unknown, for a number of days not revealed, at a cost not hinted at, to see some exhibitors which may or may not interest me because I haven't been told, (other than Carl Jacobsen demonstrating), in a venue as yet unannounced other than its the NEC, which is pretty vast and could be in a main hall or just as likely in a tiny anteroom.
I think they might need to up their promotional game if they're trying to register support.