I don't think theres any reason as of yet in the plot for him to gain it. I think either his borrowed Sharingan eye will lose sight and he will be left without it, or perhaps he will be killed. Here's a question, if Kakashi lost his Sharingan sight would he still be considerd powerful enough to become hokage.
Sig and Ava by Imotochan
yes kakashi is going to lose eyesight too, how else would he know about it when facing itachi...
lets see kakashi steal madara's or itachi's sharingan, wooo
Killer Bee killed Sasuke twice. Sweet.
I hope Sasuke steals some sharingans too, and Kakashi too...
A pie in the sky?