Those sales figures in full
Win 8 licenses sold - 500 million.
Less...
Licenses "optimised for corporate continuity and compliance" (downgrade) - 400 million
Infringing installs of previous versions - 50 million
Installs of alternative operating systems (intended) - 1 million
Installs of alternative operating systems (unintended, but the sheer horror of Metro was too much) - 68 million
Giving...
Actual instances of Win8 world-wide? 1 million; all in store fronts.
Actual instance of Win8 used in anger? 1,000 (MS marketing drones)
But none of this matters because the sold 500 million! Woo! Win8 is big baby! Yeah! Woo! Developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers, developers!