None of those systems have overlapping marketshare. WinCE is targeted at very small devices, like handhelds, GPS units, and smartphones. XP Embedded is targete

None of those systems have overlapping marketshare. WinCE is targeted at very small devices, like handhelds, GPS units, and smartphones. XP Embedded is targeted at computer-based devices used in non-computational settings for limited tasks (i.e., ATMs, arcade machines, kiosks). Vista is an upgrade to XP. Expecting a bug-free OS from Google is a stretch. Remember Android? Google put a chunk of brainpower and marketing muscle behind that, and it's nowhere close to being bug-free...and it's already been out for a year.