Just a guess, but it could be a few things:
1. Maybe the controller is preferable to a mouse and keyboard for this user, and they don't want to buy a PC controller.
2. Maybe they have a nice HDTV that thier monitor doesn't compare to.
3. Maybe they find couch gaming more comfortable.
4. Maybe, after almost 2 years, the user feels the game is showing its age.
Again, those are just guesses, but each individual has a unique experience with their games. If this person prefered the console experience, that is their opinion.