After reading this weeks chapter again I don't think Kakashi will die, I think he's the key to beating Tobi. If you look closely at this weeks chapter when Kakashi used Kamui, Tobi noticed it instantly and dodged Naruto's attack. Why did he dodge it? He barley dodges anything. He dodged it because he can't use his S/T jutsu when Kakashi does. Why? Because their Sharingan's are a pair. That is why all people take both eyes when they transplant and not just one, nah mean? But the problem wit this theory is Obito's eye got crushed... Maybe Tobi has a Sharingan with similar powers?
this guy was close, I think we all knew tobi was using a version of kamui though. but it'll probably mean kakashi will die to make it more dramatic and hopeless and shit. even though he keeps hinting towards obito-tobi it doesn't make sense with the timeline. I think madara will kill tsunade and tobi will kill kakashi, so that naruto can be hokage by the end of the war.
Here its like Tobi already knows the powers of Kakashi's Sharingan.
Notice the swirly effect just like Kamui. only it spins in a different direction.
Maybe Obito's Mangekyo had a specific power in each eye like Sasuke. Sasuke only uses Amaterasu with his Left Eye and uses the power of Tsukiyomi with his Right.
Maybe one of Obito's eyes lets them send things to a different dimensions from a distance with one and lets them cast it on themselves with the other.