There is only so much you can cram inside an electronics device. Aside from concerns about heat management, manufacturers are often limited by the size of the components they use. It’s like a jigsaw puzzle where you try to fit as many components as you can in the most efficient arrangement possible. There are two ways around this problem. The most common is to shrink, or even remove, components to make room for more. The other is to use more or less flexible components, which is what Apple will be doing for next year’s line of MacBooks and Apple Watches, or so says the famed Ming-chi Kuo.