Internet Explorer -- GPU-accelerated HTML5/Interwebs; ALL apps hardware accelerated
I have no idea why we've had to wait quite this long for DirectX utilization in the browser. Zooming, scrolling, physics -- all REALLY fast, really smooth.
They are now talking about SVG in the keynote -- and of course, they're using Clippy as an example. It seems like IE9 (or at least the developer version) can modify SVG mark-up in real time, through a console. Very cool. We'll see the same with WebGL no doubt. Now Clippy has appeared in a real-time multiplayer browser game -- one's in Firefox, one's in IE9. Both running the same code.
Big news: standards don't interact. A Flash element is locked within its box. It looks like IE9 might have less boundaries on element interactions (look at the Falling Balls demo in the IE9 Test Drive)