Re:one word: ORACLE (Score 1)

Even if Microsoft bundled their SQL server, they would still not beat Oracle in the areas where it is most successful. There are features that MS SQL Server just plain doesn't have, like full text search of anything you can wave in the direction of the database. Sure, MS SQL may beat Oracle in arenas where Oracle would be overkill, but there will always be first-class features that MS won't implement.
The technical differences between Netscape and IE, or Netscape's web server and IIS, were never very large.