From a recent entry in VDC’s blog:
In an effort to remove any confusion around its embedded offerings, Microsoft has reorganized and rebranded its Windows Embedded product family. Going forward, new editions of Windows XP Embedded will be titled Windows Embedded Standard, Windows Embedded CE will be titled Windows Embedded Compact, and restricted licenses of Windows Vista and Windows XP will be offered through the Windows Embedded Enterprise group. In addition, new products specific to certain device categories, including the next generation of Windows Embedded for Point of Service, will be offered through the Windows Embedded Ready division.
Sure, that’s less confusing!