For a start it is obviously proven that obito has some connection to the theory behind tobi, and obviously people need to get over it... ANYWAYS! Although obito's face is under tobi's mask... why would obito want to destroy the world? obito died a satisfying death, he left his one obtainable eye to his friend and died with a smile on his face thinking about his friends, and his body must have been burried because kakashi visited his grave often in the anime and it was mentioned in the manga to. Obito was a very average uchiha member even though his eyes had the potential for the mangekyo :/ So... In opposition to obito being tobi... (dont flame me) zetsu has the ability to copy the chakra of any living being and turn into that person, so it is still very possible that it is not the real obito but a zetsu copy that has remained intact for years and had obitos eye implanted into it. Also before people moan about the age difference, there is no reason why a zetsu copy cannot age since it will technically contain the DNA of the person it copied.
Zetsu has already been shown to be a part of tobi's body since he was able to detach his arm during the danzou fight.
Any thoughts?