Despite it being A Bad Idea, it look like Autodesk is going ahead with making some kind of OS X variant of AutoCAD, as has been hinted at for a while now. Owen Wengerd has pointed out a few dead giveaways in the AutoCAD API.
Another giveaway is the move to the browser-based Help system. OK, it may perform hopelessly and have terrible functionality, but hey, it’s platform-independent! If you still doubt my assertion that the development of AutoCAD for Mac would be a bad thing for AutoCAD, just go and search for a few things in the new AutoCAD 2011 Help system. Then go back to an earlier release (one that uses Windows-specific Help) for a comparison. Once you’ve seen how platform-independence has “improved” Help, just imagine that level of “improvement” applied to the rest of AutoCAD.