So much negativity about bluetooth in these comments ... and yet I can happily say that bluetooth has really changed my life. Bluetooth headphones allow me to walk around and exercise without an annoying cord trailing the length of my body. And I can get to the office and sit down with my mouse and keyboard and just start typing without plugging anything at all in. While it certainly had early problems, I'm super happy with it these days and especially the increase in bandwidth will be very welcome.
Bluetooth has made me feel happy about the existence of cords. Ahhhhhhh, I think to myself: it will definitely work, when I plug this thing into that other thing.
Its because it is a complex combination of hardware and software protocols.
With wifi you have a single channel, and basically ethernet. On top of that anything goes as far as software is concerned.
With Bluetooth you have channel hopping radios, a pairing system for devices, and a bunch of profiles/protocols that define anything from basic serial data to encoding agnostic audio.
