La opinión de Michael Caine acerca del final de Origen (Inception):
"[The spinning top] drops at the end, that's when I come back on," he said. "If I'm there it's real, because I'm never in the dream. I'm the guy who invented the dream."
Back in August, "Inception" costume designer Jeffrey Kurland also said that the totem fell because "the children's clothing is different in the final scene."
There's also the wedding ring theory. Cobb (Leonardo DiCaprio) is seen wearing the ring when he's dreaming, but not in reality. At the end of the movie, he is ring-less.
So there you have it, Cobb was back in reality.
Fuente: WorstPreviews.