From
filmtwats.com:
They asked Caine for his opinion on the cryptic ending, to which the acting great held no punches. He didn’t give his opinion, he told the nation how it actually ended - as in Chris Nolan’s intent.
“Its real life” explained Caine. “If I’m in the scene then it’s real. I’m never in the dreams.”
Darn, I thought he was still dreaming. The top didn't seem to be falling anytime soon.