Let say you used to own a camera body better than your friend (or probably a foe :-)) . Then suddenly you heard that he has upgraded to a body much better than yours. What's more his pictures quality upgraded along with the camera.
Would you feel uneasy and wanting to get a camera better than his? Yes, skill that counts the most but would still go head to get a camera that could produced a higher image quality than his one despite would spend quite a lot of money but at least 'defeated' him and thus make you a happy man :-)