Both Home and Professional can be upgraded from Windows 98, Windows 98SE, and Windows ME. Windows NT 4.0, Windows 2000 and Windows XP Home can all be upgraded to Windows XP Professional. Windows 95 is not a supported upgrade path from either version.
With SP1 complete, Microsoft will be working on Longhorn, the next consumer version of Windows. Longhorn isn't expected to hit stores till 2004 or later (probably later), so expect a second service pack in the works soon!
There were 6 major steps in the development of Windows XP:
Yes, Windows XP will have a "newer" look to it but will still have the basics of Windows we have grown accustomed to. The one that is debuted at the EMP is the "Luna" theme.
SP1 went RTM on August 30, 2002 and was released to the public on September 9, 2002.