Some very good and valid points Erik. I completely agree with you, but there are circumstances where only headphones will suffice. If one lives in a condo/apartment with rather thin walls, I'm sure your neighbours would not appreciate a full 2.1 rig that continually rocks the walls. As well, for others with young children and early bedtimes, 2.1 (or 5.1) systems are typically shut down at 8pm. The latter is my issue and how I got hooked into this cursed place.
But I do have to admit, when my wife goes to Winnipeg to visit her parents with the kids, it's all speakers all the time! I did invest a lot into my 5.1 home theater setup and now it sadly sits quietly for such special moments when I am alone and the house is quiet (not for long though after I typically pop in a Blu Ray concert disk with PCM / DTS HD sound). So here I'll sit with my head-fi gear waiting (and enjoying) as the kids grow up to finally get back into full sized speakers.