I'll be the contrarian here. I've gone to a number of local shows here in the Midwest, and find them manageable but you can suffer sensory overload pretty quickly if you're not careful. And these are smaller shows. I can imagine how overwhelming the Blade show can be.
But it's not for me. I can see the benefit of meeting the other knife nuts, friends, and other forum members, and getting to handle all the latest and greatest from the various makers and vendors, but as was mentioned, you're probably not going to find any deals, or at least they'll be few and far between. That, and the mass of people you'll be confronted with, finding a place to stay and later park at the show, not to mention the crappy Atlanta traffic, I'm just not sure it's worth it. I can buy just about anything, and eventually even stuff from the show, on-line at my own leisure.
So yes I know I'm probably missing something, but then I've never been to Disney world either and somehow managed to survive. And for those who'll probably say it, if I don't like it, don't go. And I wont.