The HTML5 interface is definitely very nice. I haven't had a chance to use Supermicro's HTML5 IPMI, as I have an X9 board, and to my knowledge the minimum support for it is X10.
I have a little experience with both the old and new Supermicro stuff. The new x10 IPMI experience is a lot like the old x9 java app experience, except you don't have to dig out an ancient computer to make it work. (Which feels great by comparison!)
