We live in suburban Chicago which gets pretty cold. We range from 0-32F most winter days. It has been below freezing since before Christmas. The past two days it has been just below or just above freezing and we have had a little rainy ice which is terrible to drive in.
The camera doesn't "make the photo" .. I make the photo. The camera is the tool that I use to make my thought process come true. I have been hindered in the past by not having the technical ability to do what I envision doing with the equipment I had. Now I have increased that ability.
So, no, I will not be taking "much better shots".. I am the same man holding the camera, with the same ideas and "vision"... however, I will be taking shots that I could not take before.
Nothing happened to the old camera. It is now my "backup/spare" camera. I had just out grown the capabilities of a 4 or 5 year old camera, and it was time to move into a truly professional level piece of equipment.