It would be good to have something Apple-supported, but this certainly wouldn't be the first Cocoa port (see GNUstep for Linux).
The thing is, Mac OS X is compelling to developers for reasons beyond Cocoa. So just how much would Apple have to provide on Windows, before Windows is worth my time anymore?
For example, I love being able to depend on Python and basic Unix tools without asking users to download them. And I like that POSIX APIs are supported. These aren't Cocoa, and sure aren't available out of the box on Windows.
The thing is, Mac OS X is compelling to developers for reasons beyond Cocoa. So just how much would Apple have to provide on Windows, before Windows is worth my time anymore?
For example, I love being able to depend on Python and basic Unix tools without asking users to download them. And I like that POSIX APIs are supported. These aren't Cocoa, and sure aren't available out of the box on Windows.