AnandTech has some coverage of the WinHEC 2006 keynote:
Of the conferences and trade shows we attend each year, WinHEC is one of the most enigmatic. While most fanboys would be very happy to attend E3, both for the demos and the booth babes, it might be a little more difficult to "get into" something like the Windows Hardware Engineering Conference. The focus of the conference can be very technical, which isn't a bad thing by any means (especially for nerds like us). We, of all people, can get excited about the low level architectural details of computer hardware. But the technical detail provided at WinHEC is generally very Microsoft OS focused rather than hardware centric.