[InclinedPlane]

Some degree of cross-pollination is desirable, at least in terms of usability for the average computer user. It would be a mistake to imagine that the particular limitations and constraints of either iOS or OS X as they exist today are global optimums.

[ranqet]

I agree, and we do see plenty iOS feature appear in OSX and vice-versa (notification center for instance).

But it should be kept in mind that we are dealing with separate paradigms. The way one uses a tablet is very different from the way a laptop used, and software should be designed along these lines.