As someone who is actually a(n amateur) photographer, I can really appreciate the Icon's camera, and the ability to shoot in RAW is awesome. I honestly don't think I could go onto a non Lumia smartphone because I've been so spoiled with the cameras.
I know what you mean! I've always taken photos with decent Canon p&s cameras, so I'm very picky with my camera and usually stay with the same brand.
So far, I haven't felt the need to leave Nokia's camera phones yet.