Is this what the "IE is native" PR claims are about? That HTML DOM and CSS are going to map directly onto the window system instead of a virtual window (or whatever it is called) in the browser engine?
Er, no, they didn't. They mean fully (or significantly more fully) hardware accelerated, and they've said that many times - hence all the benchmarks of 2D canvas in IE9 vs Chrome.
Personally I think IE9 is a shitty browser - no 3D context for canvasses, gradients, history, or 3D transforms. But you don't need to represent MS to prove that.
Microsoft's own immersive html application is just a thin layer over native code
http://forums.mydigitallife.info/threads/26404-Windows-8-(79...
.NET Ahead-Of-Time compiler is probably coming
http://forums.mydigitallife.info/threads/26404-Windows-8-(79...
[EDIT]
And for those worried Silverlight developers, scan that thread for DirectUI.