According to this interview with Bill Gates, the next version of Windows (Longhorn, now due 2006), may have support for all kinds of high-speed networking technologies, partly at Intel's behest. He mentions ultrawideband and Wi-Max specifically.
When Microsoft released Windows 95 with TCP/IP support, it helped a lot of early Internet applications take off ?? not least being just basic dial-up ISP access. Maybe Longhorn will have similar effects.