Shown of a Mobile World Congress this head-mounted computer with its voice-controlled user interface uses Windows CE 6.0 on an ARM Cortex A8 processor and is intended for industrial use, but I can easily imagine freaking out everyone on the plane by pulling this out this unit in business class.
The full specs are:
CyberDisplay® SVGA microdisplay
32-bit native, componentized, Microsoft Windows Embedded CE 6.0 R2 operating system