Usually, a CPU that offers more processing power also requires more energy--and in a laptop, that results in shorter battery life. But with Haswell, Intel's fourth-generation Core processor, the company promises to boost processing power and graphics performance while using less energy.Related StoriesApple's Mac move could spur PCIe flash flurry in other notebooks, desktopsMicrosoft's ambivalence about Office on the Web gives Apple shot with iWork on iCloud