Yes, we'll still be supporting IE 7 and IE 8 for some time, and yes, IE9 still lacks a few things, like support for CSS 3 text-shadows or HTML5's form elements, but it's a step in the right direction.

Moments ago, Microsoft released Platform Preview 2 of Internet Explorer 10. The most notable additions are the inclusion of a number of HTML5-related features: drag-and-drop, web workers, and sandbox.