Usually any new product from Cool Mini or Not (last year it was The Others: 7 Sins and the year before it was Blood Rage). Hoping they'll have something for their newest (not yet on Kickstarter) Eric Lang game Rising Sun).
I haven't seen anything from Zman games (Pandemic) but I'm hoping they've got something cooking to make my Pandemic Cthulhu even deadlier :)
Last year Fallen Dominion games was in the midst of their Kickstarter campaign for Fallen Lands and I hope that I will get a chance to play it this year (esp if I haven't gotten my copy yet). They've been doing smaller conventions this year so I'm hoping to get some time in front of it.
Last year the Kickstarter room was a blast (Cards Against Humanity, Secret Hitler, etc.) so I'm hoping for another year of that.
First Exposure playtests are another good thing to check out. Not only do you get to provide designers with feedback but you can try games you'd normally not sign up an entire slot for (deck building games for me).