inception's ending

so cobb really did united with his children in the real world and not in dream due to the spinning top drops at the end.and it has been confirmed.

in reference to:

""[The spinning top] drops at the end, that's when I come back on. If I'm there it's real, because I'm never in the dream. I'm the guy who invented the dream.""
- Inception Ending Revealed by Sir Michael Caine (view on Google Sidewiki)