In what general direction would the innovation be?
I'm not sure if it's actually needed - a lot of things have been tried and the paradigms that persisted you can choose between but it seems to be a matter of taste. I often feel that the real issue is the lack of maturity and stability. I rather want a complete UI toolkit including learning resources (not reference docs!), no matter how boring, instead of super clever implementation that is never in a usable state.