iPod has moved in a direction toward greater external HD use, if anything. Intel Macs, most PowerPC Macs (with the exception of boot capability), and PCs all work with current iPods. Like it or not, Firewire is being repositioned in the computer market as a whole. This technology is one developed for OS X and of course would not work with any other OS. Whether or not it will require an iPod is unknown (but doubtful)--it just happens that lots of people have iPods, which make for convenient "satellites" for this system.