I think a good idea will be to use widgets not only in sidebar, also designing main content, pages, etc.
It will be nice a new layout system where you drag&drop the diferents elements in the main page, or when it's a single page. You drag the widget of post content, post cronodata, post metadata, post comments, post social, etc.
A minimun number of widgets will be provided by WordPress, with the hope that in a future those nice people which developes widgets for wordpress, it creates a lots of choices for people like me, with a basic skill.
And why not! widgets for the header, and the footer, and , everything your mind could get.
I hope YOU like this idea.