I'd go if it wasn't in Nashville, the travel expenses alone would eat up my budget. /sarcasm
But with that said it's definitely worth the trip, I went to Worlds last year as a spectator and I enjoyed it. Events basically consist of small tournaments and prerelease-style events and you get points that can be spent towards prizes. Vendors are more iffy, TPCi has been cracking down on ones not endorsed by them and as a result those that still bring stuff that normally would be sold on the sid are now used as trade fodder.