I've been to a couple of these "shows" in the past and it mainly a promotion and sales event for 4Wheel Parts.
They invite vendors and manufacturers of products they sell in the stores to attend the show and to demonstrate and sell their products. There are some interesting exhibits and events, but, in general, you wouldn't miss much if you don't attend. I'm not going this year for that reason but, if you've got nothing else to do, it's as good a place as any to waste some time and, if you find something you can't do without, maybe some money too. .
My bad!! Hard to see everything on a iPhone.. I'm gonna check it out on Sunday.. Hope to see some of yall there.. I'll be looking for the FJ parking section.. Lol