I don't trust anything coming out of Obito's mouth. Though of course, it is quite plausible. Furthermore, his monologue once again confirmed that the Uchiha (well, a lot of them) have some screws loose... "Rin dies so she is a fake, you killed her and couldn't keep the promise so you must be a fake" Seriously, consult a doctor...
I think it's quite obvious that Naruto is following in the steps of the Sage. Kurama thinks so, and his appearance in Full Kyuubi Mode says so, the Juubi's vision's just another confirmation imo.
It's a genjutsu. He used it to illustrate his knowledge for us and Kakashi.