Safari 5 anyone ?

Since we still need a plugin or if scenarios to leverage HTML5 accross all browsers I'll give a couple of months to it to mature for addons/extensions to be really there.

HTML5 raise a lot of security issues as well. (Offline Storage + Workers + WebSocket = wet dream)

Soon we wont need client and plugins anymore. It will come fast and at full pace. Be ready and do your homework.