The obito threads are going to blow up even more this week. Maybe its just me but tobi just implied that he really is obito when he scolded kakashi about not being able to use the eye to its full capability because it is only "borrowed". Implying that tobi himself is not borrowing it but infact the original user
Imo this chapter just nearly confirmed that this is not Obito, but that is all it did... As some might put it "kishi is trolling us" or to say it in a different way, he is trying to put up some signs that Tobi is someone else than he is, so that the revelation of who he is will be like !!! "wtf!". He is just building up a climax. Story wise, it is obviously distracting Kakashi quite a lot, and since kakashi is the one who allows the party to hit Tobi, it is a brilliant tactic. He probably even thought Kakashi's Kamui might prove to be a slight thread to his plans, though he said it would be useless against him.
Saying that kakashi can't use the sharingan to it's full extend since the eye isn't his, is just taking his tactic of mind****ing kakashi even further, further more saying something like this isn't anything new, there are a lot of uchiha members who has mentioned that people without the heirege will not master the sharingan as well as people of the uchiha clan... I am not saying that Tobi is an uchiha, i don't want to take any guesses, but Tobi has been acting as one of the uchiha family since he was introduced.
The Eye might be obitos, but it could very well have been transplanted.
So obviously revealing that Tobi is obito, and then ending the chapter with the clifhanger of letting people know that we are gonna see his face in the next chapter (unless he will skip to the five kages or sasuke in chapter 599) would make abseloutly no sense, unless he was trying to misslead people thinking like i do. If he was Obito he might as well have revealed who he was in 598, but i really don't believe he will be him, since kishi is a good writer, and wouldn't make obito the super villain since obito has no motive..
Oh well i wrote a little too much, sorry for my english, i'm not really into correcting my own gramma since english isn't my main language.
BIG LOVEZ
Ix