I don't own a PC and most people who buy consoles likely don't either so I don't understand why some people keep acting like everyone owns one.
I always considered games to be "console exclusive" or "HH exclusive" personally. For example, when SSB4 is released, I will count the game as both a Wii U & 3DS exclusive. Why? You can't get the game on another console or another HH.
Same thing with the PC, I consider "Left 4 Dead" an XBox exclusive. Can you buy it on the PC? Yeah. Is it on the PS3 or Wii? Nope. It is a + for the XBox and a - for the others.