I would be one of those rare people who use a point and shoot and have no desire to upgrade at the moment.
I use a Canon SX20 IS which is a high-end, point and shoot, super zoom camera.
Why no desire to upgrade to a DSLR? First and foremost, it is the photographer who takes good photos, not the camera! I am learning to push my P&S camera to the max and I'm loving it!
Second, I love the portability of my point and shoot. Granted, my camera is large compared to normal P&S cameras but at least I'm not having to tote around lenses along with my camera.
Third, I am simply a mom with a camera. I have no desire to be a professional or anything other than a mom with a camera so I do not feel like I need to spend a ton of money on cameras and equipment. If I can push my P&S camera to the max and get the photos I want, why spend a ton of money?