I love it! Microsoft head honcho Steve Ballmer makes a throwaway comment about WebKit in response to an out-of-the-blue question and tech pundits the world over have a collective blorgasm.
OK, I'll admit that it would be very cool if IE did come kitted out with the WebKit rendering engine. It's a very good rendering engine, as demonstrated by Google's Chrome (I would say Safari but for the fact that the rest of the browser is a total letdown). It's very fast and gives consistent results. Making the switch would also give Microsoft a rendering engine they could use for the Windows Mobile platform.
But it's not going to happen. Certainly not on Ballmer's watch. Why? Plenty of reasons:
Not gonna happen ...