I've never been in the ones at State, but I've been in the ones at Memphis, and they are sliding glass that can be raised. Of course with the way the seating is done, raising the window actually hinders the view of those at the back of the box.
Either way, I just thought I'd throw that out there since from my experience it's not as good to be sitting inside during a game. Obviously when the weather is extreme it's nice to have that option, but I still think I prefer being outside.