Remember the windows Metafile issue a few months back ? Wine users noticed that their API suffered the same issues as they made an metafile API that did exactly what the windows metafile API did right down to the security hole. As a result linux systems could be affected if they ran wine. (they fixed it in days)

If you intergrated the windows API's into any OS, the security threats that use the API ae now on your system

Chill out, If apple started on it now, It might suface in 3-4 years.

Its a monumental task and one that Apple are unlikely to commit to. Its simply a utopian dream that wine once aspired to and is still working to make some applications work.

Thee are thousands of API's to port.