Inception.

The end definitely left everyone thinking if the top ever stopped spinning or not.. Cuz Mr.Nolan rolled the credits before anyone of us could actually find out ..
Well we could see the top wobble but still spinning ..
If the top had stopped spinning Leo really pulled off a beautiful crime ..
And if it dint stop, he certainly is living in his dreams..

End is more like this,
Leo was obsessed with his children right from the start.. So he walked away than just waiting to see if the top ever stopped spinning or not.. Cuz either way, all he wanted was to stay with his children in whatever place he could, so why not it  be a dream!