It doesn't help that (a) consumer Windows laptops have come so pre-loaded with junkware that they were just downright unpleasant (and often unreliable) to use, and (b) Microsoft dropped the ball so hard with Windows 8 that it fell through the earth's core and came out the other side.

Compare the extremely unappealing offering that is Windows 8 on a junkware-laden laptop with the convenience of a tablet for everyday consumption/casual gaming uses or a much more polished MacBook Something for more serious users, and it hasn't really been a serious contest for several years now. Plenty of people already had a laptop that was good enough for what they needed anyway, and most people looking to buy something new have dramatically more appealing options than the kind of thing Sony or Samsung were selling.