I'm curious, but not excited. Nor do I actually hold out hope that the new sequels will be good.
I've seen three of Abrams's movies. I thought Star Trek 2009 and Super 8 were merely serviceable movies that covered well worn ground and offered me nothing new. Star Trek Into Darkness I actually despise.
Despite that I think he can do much better than modern George Lucas would have with new Star Wars movies. What Abrams will produce will likely look and feel like very familiar, but at least it shouldn't travel down the path of the prequels.