also if naruto becomse profecient with it he will be able to do it from both his hands and hit feet one would imagine. also he may be able to do it on any part of his body. who knows later it could even lead to a defense.
God I hope not, that would make him Neji version 2. Anyways I bet Jiraiya crapped his pants when he found out he was about to face Hidden Stone Chuunin :/.