Interesting idea being researched by Sony called tranSticks. They refer to them as a “wireless wire”, meaning they function in much the same way as a wired connection would. Think of it as a limited access network between devices. Say you want device A and B to be able to talk, but not device C. Give A and B the same tranSticks and they can chat, while C is left out. Seems like an overly simple way of doing wireless networking, but given the possible “plug and play” configuration, I could see some benefits.