I have noticed some wide disparities of performance in reviews of the new Macbook. One review I read put battery life at 7 hours, another at 11 hours of continuous video playback. Since there were no specifics, I don't know what to attribute these differences to. Who knew that the growth of mobile devices would direct manufacturers to focus on the design of the device? Intel's concern is now heat as much as power efficiency or performance. This point aside, if I were going to put down money for a new laptop, and using Mac laptops as an example, why would I plunk down $1300 on a Macbook when I can put down $800-$900 on a Macbook Air, and buy better performance and battery life? Sure, the Macbook is thin and light, but isn't the Air already pretty damn thin and light? This question applies to other PC makers. Are other PC makers watching Apple to see if there is that strong a market demand for laptops that have better screen resolution, weigh less, and have slicker design but poorer specs overall? Do these questions make any sense?