MS Open Sourcing an O.S say what ?

Welp it seems Microsoft is finaly seeing the light and feels like becoming a FLOSS jedi .
Oh wait it's only MS-DOS 1.25 and 2.0

Thoughts ? projections ? wishes ?

Personnaly I'd like them to do just the same until Windows 98 SE at least now that would be a good sign. Here it comes of as petty to me ...
- TheSyldat