I would say, this is good only. After a release we have to give time for industries to bring up their websites up to that mark. With IE 10 HTML 5 support would be great. Then its the industries should use HTML5 video/audio instead of Flash Video/audio streaming. HTML5 drag & drop features should be used many sites.
A good JavaScript development framework is needed for developers. Its not just about release a version frequently. Its about what standards are added. Sometime chrome just does bug fixes call it as new version and that would not change anything in the industry.
I would say with IE9/10 the Internet standards support has increased substantially. That is good enough to build a website more attractive and interactive.