about kakashi's sharingan ive ruled out the idea of obito actually giving kakashi one of his eyes, i think obito will either teach it to kakashi somehow, i mean who says it is limited to only the uchiha clan, maybe they can just use it the best and the easiest since it runs in their blood. but i think its more likely that obito somehow uses a seal technique to seal his sharingan, then making the seal on kakashi converts the sharingan to him before dying.