We've always thought switchable graphics made a lot of sense on laptops, and NVIDIA's new Optimus tech looks like it's going to bring it mainstream in a serious way -- there's no more manually toggling between the powerful discrete GPU and the power-saving integrated chip. More than just automatically switching off the discrete GPU when the laptop is unplugged, the idea is that you don't have to think about when you want to use the different graphics options: the software and hardware combo will take care of deciding which graphics processor is best for the application or content. For instance, launch Call of Duty 4 and the discrete GPU will power on, close out and start writing an e-mail and it will switch to the IGP. Sounds pretty si
