I'm a PC player so I don't know.

Does it improve your unarmed like it was rumored or what?

Thx

http://www.gamesas.com/topic/1428101-how-does-dragon-aspect-make-other-shouts-more-powerful/

It should go without saying that there be spoilers in that forum. So clicking the above link if you are spoiler-averse is your own fault.