A new interface and the end of the DOS legacy.
With Windows XP, for “experience”, Microsoft is *finally* retiring DOS and unifying its operating systems under the NT. Until now consumer and business Windows versions had been based on different programming technologies, with Windows 95, 98 and Me running on the older DOS code base and Windows NT/2000 runnning on NT.
Windows XP features a “dramatically different new look and aims to extend the personal computing experience by uniting PCs, devices and services”. XP is scheduled to be generally available in the second half of 2001.