I saw just pointed to this very impressive cinemastyle video, shot with the Nokia 808 PureView. It's made by Chris West, WackedWest on YouTube - and once more I think the quality is absolutely stunning.
I will quote in full what's added to the video on YouTube, since there's a lot of technical explanation that might interest you too.
Remember to choose 1080p for highest quality! This is just a test I made for myself so I could see how a mobilephone could hold up as a cinema camera.