It looks like they are able to be zipped open and rolled up so that it can be opened up, so perhaps on hotter days when they want more air flow. Seems to me that those walking by are most likely on their way to something else anyway, but it does kind of change the way you can kind of casually watch for a moment while heading one way or the other.
Those plastic shields on the theater in Italy were added late last season--they may have been there for Howl-O-Scream and were definitely there for Christmastown. My guess would be that maybe they'll take them down once it gets into HOT season there in VA, but they left them up for early Spring......
I’m pretty sure they are going to keep it enclosed all year. They will just open the windows up during the hotter months. Makes the transition from normal operation to fall/christmastown operation much easier.