It's not quite as good as a Faraday cage (or better yet, not putting up wireless access points at all) but it'll definitely be on the radar of IT and infosec professionals in the near future thanks to some very high profile network intrusions that used wireless networks as their beachheads: A thin, transparent film that is not only impact resistant, but filters RF emissions, so that signals from outside can't get in, and more importantly, signals inside can't get out. Supposedly, this stuff's been in use on the government side of things for a while now, and it's just …