No surprise there. I would not count on any "information" that fanboy has.
Microsoft is really handling this reveal very amateurish. All this confusion, and hear we thought all of the rumors before the event would be answered by the reveal... We know not much more than we did before.
This isn't totally GAF's fault. There's been a shitstorm of misinformation and failure by MS/Gaming press to actually confirm these reports. Between this and the used games report, who the hell knows what's going on?
Guys. If it had an internal PSU, a) we'd see it in that Wired pic, and b) the back plug would be your standard 3-prong deal. You know, like every PC. Or the PS3. It clearly has a proprietary plug. The brick needs to power both the console and the Kinect sensor.
Powerbricks are ugly, but in the end not much of an annoyance. I have them piled up with the rest of the cable mess behind my TV cabinet, and forget about them until the next time I have to plug/unplug something from there.