The OP didn't share all the source info..

“In terms of sound, practically none, you can hear the fan if you listened closely but nothing exaggerated. they had ventilated consoles and others put in enclosures completely closed that were running from 9am without stopping (we got there at 18:00 in the evening). they were running fine and were quite warm on the surface but nothing like our curreng generation consoles.

The only exception to that was one console that was completely enclosed in an acrylic case , it was showing a red light (where there would typically be a blue light) and there was a message on the screen that said the console’s temperature was too high. the Acrylic case was opened and within minutes the error message went away and the light went back to its normal color.

These consoles were test units, they seemed fully capable in every way.”

poor early adopters.

The PS3 Slim is really quiet, my Jasper 360 is noisy like a Jet taking off, I wonder how noisy are these new systems. Also, everyone know you cannot place a videogame console in a closed case with no ventilation, I don´t think sony is that stupid, this WILL be solved before launch;

What I've read so far about the XBoxOne is that it can regulate the speed of the CPU/GPU? and down grade the performance if its running too hot... it's been mentioned a couple of times by MS... but I would be surprised if they dont have some form of "Turn off too hot" message as well.