They have games like that already ... they're called real-time strategy games.
No **** but no reason we can't see these things more in rpgs. Rpgs need more depth besides getting green, blue , yellow gear to play ken doll with your character or party with. Fallout, torment all these old late 90 rpgs. Don't need to make yet another one like dragon age origins brought up to date. Not saying dragon age origins was a bad game but there wasn't anything seen in it that wasn't done before.