Well its light-years ahead of IE 9 and (almost) catches up to other major browsers in HTML5 support so, yes, definitely.
I am really happy with the direction of IE10 even tho I’m a huge fan of Chrome, my latest scripts are responsive and works great on IE10 too, including IE9 for Windows Phone (and I guess the desktop too). But they are still have to catch up with the other competitors.
I am very pleased with performance in IE9 , and further more in IE10 . It’s lightning fast and beats almost everything.
Well, IE10 for Win 7 is still under development so you can’t test all features. But I did download the preview and I have to say that IE is starting to catch up with all other browsers.