iOS is OS X, it's just the interface that's different. Since that's the main difference, are you all saying you want drop-down menus, windows with sizable edges and scroll bars on a touch-screen device?
Sounds horrible.
That's not what he meant. Simply being based on the same technology doesn't mean two two operating systems are the same. They don't run each other's apps, so it's not a fair comparison. You might as well lump them both in with Unix. Sure, iOS and Mac OS have a lot in common, but that is largely because they are made by the same company, not due to the low-level programming that they share. My washing machine might use some sort of embedded Linux for its brain, but that doesn't make me a Linux user.