One of the features touted in both Windows XP and Windows Vista is a set of power-conservation features that encompass both desktop and notebook PCs. Saving power on a notebook PC is an obvious benefit, but reducing desktop power consumption has now become a much bigger deal than it might have seemed even five years ago. With Intel and AMD rolling out CPUs that boast of less wattage, it makes sense for Microsoft to provide additional fine-grained control over power consumption on their end.
To a high degree, that's what they've done with Windows Vista, and XP users are going to want to know how to dig into all that and make use of it.
