Despite the fact that many developers would welcome more rendering-engine compatibility, anyone expecting Microsoft to switch out its “Trident” engine and replace it with WebKit in Internet Explorer (IE), especially in IE 8 is misguided, as speculated by Steve Ballmer.
Here’s why Microsoft switching allegiances to WebKit is not feasable at least not in the near term:
1. IE 8 is almost done
2. Microsoft is pushing test cases, not rendering engines