Windows CE has tottaly caputed OS market for rugged devices, companys like motorola, intermec, Dolphin (Honeywell).
Plus Windows CE and Windows Mobile has an enterprise grade database platform.
When comes to spending money, companys buy $1000+ plus devices and build real applications on them.... I see Windows CE being around for a long time and the chart above only show smartphones and no other device, Android and CE can be on in TV's, running gaming system or anything eles.