There are a lot of things that we collectively will find attractive about the trade shows, but in reality it's only what you make it. for each person/business it is probably something a little different.
There are tons of opportunities in education, business dealings, exposure to products, tools, technology, and occasionally something that makes you sit up and take notice...even for a jaded old #%*$ like me. But if you don't go, you'll never know.
My intent is to go to 2 shows a year. The WCAF in Las Vegas, for the education* and to Atlanta for hardware, software, products, supplies, and Grumble dinners (the education is pretty good there too, but there are so many other things to do).
*Contrary to the advertisement, not all that goes on in Las Vegas stays in Las Vegas...you can take what you learn home with you.
As for depending on your suppliers for information, and I can see a few eyebrows raised here, I would caution you against complacency. Your suppliers will keep you up to date on only those things that they handle. If you do go to the show, and I encourage you to, I can almost guarantee that you will find things that you didn't even know existed, and will wonder how you lived without them for so long.