Well we could replace Kakashi's surprise w/ Asuma's surprise and continue discussing. This whole chapter about the wind element was described in terms of its cutting ability...hence Asuma's wind chakra manipulation in combination with the blades. If Kishi were to be predictable, Naruto may create a wind jutsu to counter Sasuke's shooting chidori from his body jutsu. Just like their last battle except this time they run at each other; sasuke with a thunder aura surrounding his body and naruto with a wind aura surrounding his body and boom! k k that was a lame joke. still i have a feeling Naruto will develop a wind jutsu that cuts. (did Sasuke not use Chidori with his new sword?)

And the premise exists that the wind jutsu is the strongest close/mid range elemental jutsu (I believe so far Sasuke has used Chidori as a close/mid range elemental jutsu)... thus good guy wins..or not (more plot devices where jutsus that shouldnt win do win tangent blah blah).