Internal power supply adds to heat inside. When the PS3 came out, it sounded like a hairdryer on high after 10 minutes of watching a blu-ray. Maybe the 4 in PS4 means we can turn the volume of the fan up to 11 instead of 10?
Camera $60 extra and only functions for comms and with move controllers @ another $50 each (why does the system need additional motion controllers in this day and age)?
So, to truly get the near the same functionality as what you get out of the box for $500 with Xbox One, you pay about $510 with the PS4.
Oh.. And PSN+ is another $50. So the buy-in price is lower on the PS4, but so is the overall functionality. That will help some people get in on the next-gen with this console, but there's no really great functionality outside of a graphics upgrade with this console... although the console shape will perfectly match all of the other inefficiently-designed parallelogram-shaped decor in your entertainment center (because we all have some of those lying about!).
No thanks.