Great idea!

An OS built specifically on and around an embedded enterprise class RDBMS.

Of course Microsoft would be a bit late to the party…say 30 years or so; given that the IBM System/38 was announced in 1978 and delivered in 1979.

The current descendant of the System/38’s operating system, IBM i running on POWER hardware, of course continues to have an integrated RDBMS which is known as IBM DB2 for i. http://www-03.ibm.com/systems/i/software/db2/

-Charles