- Large market for programs and games.
- Windows has easier to apply themes (although it's only marginally easier, since it's fairly easy to change a lot of the things in OSX anyway).
- Available on more hardware (but Linux does this, too, so I think technically Linux is better at this than Windows and OSX).
- Blu-Ray (solved in OSX with VLC/MakeMKV + external blu ray drive)
Would say networking, but I think Linux takes that one, too...
Other than that, I can't think of anything else. I use both OSes in different settings, but don't get how explorer is more powerful than finder (if someone wants to explain it in detail, please do ).