It seems like its an important factor for most people who buy a macbook pro so why don't they focus more on improving the battery life on macbook pros ? I thought there were going to be impressive gains with haswell and the energy saving features of mavericks , but its only an hour improvement over last years retina macbook pro. AND the new retina macbook 15" actually has a smaller battery than last years version ? Why not just have the same battery capacity size to get even better battery life ?