I agree with HariSeldon. It seems like a bit of a stretch. Perhaps the only hope is that there may be official / branded / 3D glasses made by well known companies as part of promotions and whatnot. In that case there could be a use for your domain in that situation. It depends how cheap and/or interchangable 3D glasses generally are. If they are expensive and system specific (i wouldn't imagine so, but who knows), then it rules this idea out.