HTML 5 has interesting features for developer and user, but if customers are still demanding to have support for old browsers should designer/developer go for HTML 5 ? Or should stick to good old ways using JavaScript libraries, flex and flash to do the heavy lifting.
If accepting HTML 5 is too early, how long you think it will take to use HTML 5 features for big web application? (hear by big i mean application still reaching huge number of users with different OS and browsers combination)
Do you think HTML5 will carry all the issues(cross browser stuff) that web developers have faced over decade, or it will make life easier?