[quote name='phantasyx']
[/QUOTE]
Going to have to disagree with this for a few reasons.
I saw it again and it makes sense now, cobb is still dreaming because his kids are projections of what he remembered of them, he's been away from his kids for months but more likely years, whatever the case they look the exact same as he remembers and the movie ends before you can tell if the top fell or keeped spinning. He is also worried everytime he spins it but this time he doesn't care if its dream or reality.
Going to have to disagree with this for a few reasons.
Ariadne first said that Cobb would be fine. She was right about everything else throughout the movie, I highly doubt they would choose the last scenes to make her wrong. Also, Cobb knew how to navigate through Limbo in order to find Saito, which is why Saito had aged(because he did not know he was dreaming) and Cobb was still the same age. Cobb knew once he found Saito, all he had to do was kill himself and saito in the dream to be woken up. (The same way he did with Mal regarding the train). If you remember the last scene in limbo was Saito holding the gun. Also, as people have said, in a dream, the totem would spin perfectly, however in the end, the totem wobbled as if it were going to fall.