There are more knobs to fiddle with, naturally, but the desktop Linux experience has vastly improved over the last few years, and I'm happy enough with it that I don't see myself willingly going back to OS X or Windows as my primary anytime soon. My desktop feels like the synthesis of all the things I like from both Windows and OSX, with the added benefit of an actual package manager and first-class support for all my development toolchains. The amount of time my coworkers spend fighting oddities in their brew installs becomes really apparent when I'm not fighting those battles.
The hardware (particularly) touchpad is the single biggest advantage Macs have left. I use a mouse rather than touchpad, but if the touchpad is solved, I'd have nothing I'd say that OS X does better.