Your next computer may not have a monitor. (Well, OK, maybe not your next computer. Maybe the one after that.) It might have a scanned-beam display instead, using milliwatt RGB semiconductor lasers to raster a display image directly onto your retina. Power consumption would be virtually nil.
Current systems are monochrome only, but color is coming. Currently, scanned-beam displays are used mainly in technical or medical applications, but the Stryker LAV has an onboard battlefield computer with a helmet-mounted display for the commander, bright enough to be readable in daylight, and future applications in the next five years are expected to include digital cameras and handhelds.
Suppose your next motorcycle helmet had a built-in HUD.....