Source: http://gizmodo.com/5942285/intels-haswell-3d-transistor-chipset-will-have-2x-more-gpu-power-than-ivy-bridge
Intel's next-generation laptop chipset (Codename: Haswell) isn't set to come out until next year, but when it does, AnandTech says the 3D-transistor-based hardware will offer twice the GPU performance as Ivy Bridge, and when idle, will consume 20x less power than Sandy Bridge. Excited yet? [AnandTech]