Remember, Mac OS X is just a hop-skip-jump from Linux compatibility. This allows MS to work on their future Linux versions (thus somewhat enhancing their survivial chances against Linux/Mozilla/Star-OpenOffice) without panicking their investers by announcing that Office runs on Unix/Linux now. MS, despite it's recent games, is no longer in a position to fight the big dogs, and it financially can't afford to try and outbid IBM for SCO, even if SCO somehow wins it's BS linux IP case. (Not to mention that MS is directly forbidden from owning a Unix asset by previous court demands.)
