Prince Harry has already been prevented from serving with his unit in Afghanistan amid the fears that he would be a high-profile target and therefore increase the risk to himself and to his men. Prince Harry had trained with his troop, and was aghast to be told that he couldn't serve with them.
I believe that Prince Harry is as capable as any officer in the British Army, and I daresay that he won his award on merit alone. However, media interest will probably prevent him from ever deploying on dangerous operations.
Worth pointing out that he did actually do 10 weeks of ops out there before the media blackout was violated by johnny foreigner.