WiFi networks are prevalent everywhere, nowadays with less people wanting the hassle of tethered Internet. Many wireless devices require WiFi or 3G to connect to the Internet.
What is most annoying about having WiFi is the people who will try to piggyback on your open network or try to hack your password. With this coated wallpaper however, you will never have to worry about freeloaders ever again. Unless of course, they are inside your own house.