I mainly bought the PS4 as an impulse purchase. Amazon had some in stock at 12:01 on release day, so I dove in and grabbed one. I'm not a huge gamer, but there are some titles coming up I definitely want to play (like Wolfenstein). I figured if I was going to continue to pay for software I might as well roll with the top-of-the-line graphics also.
I've never been able to afford a console on release day before, and I have a good job now, so this was basically Christmas to myself. The only system I've ever purchased on release day was the original GameBoy Advance