Nokia Lumia 920 is now my backup camera to my Canon 5D Mark II (Sample Images)
Just thought of sharing my experience. The main reason I got this phone was because of the camera.
It's true that the images by default are soft and not as vibrant as that from the iPhone. However, as a pro-photographer, I don't care about that. The base image from the Nokia is really good... especially in low-light situations. And with SkyDrive, the images show up in Adobe Bridge automatically. And that's where the magic continues.
In summary, this phone has the best base/seed image quality that allows me to treat the photos similar to that of my 5D Mark II. I can do all the needed post-processing there come up with some fine looking images!