I wouldn't count the Windows embedded OS as that far below the embedded Linux OS.
There are processors that are optimized for both OS.
The Win CE has the Windows Mobile/Pocket PC user interface, much like Linux has
Android.
The Win CE has .cab files for program installation just like Android has .apk files.
http://msdn.microsoft.com/en-us/library/ms834453.aspx
http://en.wikipedia.org/wiki/Windows_CE
http://www.microsoft.com/windowsembe...compact-7.aspx
http://www.pda-archives.com/wince/1.htm
If you really want to get into this you can hang around
http://www.xda-developers.com/ for
awhile.
Luck;
Ken