HTML5/CSS3 and Portlets

Currently many rich portlets are developed using Flex and in most cases it's difficult to integrate Flex portlets with the portal server infrastructure. I haven't seen many examples that demonstrate use of HTML5/CSS3 and Portlets but a quick look at the features offered by HTML5/CSS3 suggests that it'll make quite easy to develop rich portlets. I feel that portlets as well as web application development is going to get a big boost with the arrival of these new specifications.