The website hasn't been updated. Their Twitter feed promised to release the names of next year's acts, masterclasses etc. as soon as they are confirmed.
Jean-Luc, I agree, but really, these events aren't so much about hearing the sound of the instruments or the effects, unfortunately - too many people test-playing them at the same time, and the constant racket just makes it impossible to judge. I go there to see what's new, look at and feel the models I'm interested in, gather info etc., and of course see the acts and attend the masterclasses. The show is just a starting point.
PS I'm not connected to the show in any way, just a veteran of the variously named London guitar/music/bass/drums/whatever shows for the last 15 years or so.