Since the D5200 has not been introduced yet, it is hard to say. Assuming it uses the same sensor as the D3200 it then depends on the body you are comparing it to. The additional resolution compared to the D5100 will provide the ability to print larger or crop more aggressively without losing IQ. Like every new generation body, it should also have more Dynamic Range and better high ISO performance compared to the previous generation of bodies. Good Luck and Enjoy your Nikons!