systems and chips which can turn off parts of itself to lower the watts plus other measures.
As a user you get windows modes, small web and office user, developer, light gamer, heavy gamer.
small office mode
the graphics card turns off and ports the cpu gpu through instead.
some more cores are turned off and some of the functionality of the remaining cores are is turned down along with a low clock and certain mother board functions in low mode or turned off.
developer mode
Here the graphics card isn't on but can be turned on for processing use, so if the developer is busy writing code or doing something non demanding on the power gpu then he's not wasting watts, in this mode the Processor is running at a higher clock fully functional with special modes for the motherboard to only kick in power when necessary.
light gamer
a reasonable but not to high clock with a selection in windows for a given game to turn on the main gpu.
heavy gamer
over clocked full functionality all the time more so and just basically for raw performance.
This would allow the x86 community to benefit with less watt use when demand is not too high.