Hmm not sure if I like the fact, that the fan is spinning the other way round. Not only will that most likely be worse in terms of cooling, but will also push warm air towards the GPU in normal ATX cases & big towers, if you decide to mount the PSU that way instead of the normal way which would be fan faced down, to suck in cold air through a dust filter (which again wouldn't work properly as this PSU would BLOW the air through the filter). It will also generate an area of high temperature in cases with false floors/PSU covers. That might not be a problem, but that warm air could simply flow outside with a normal fan...
So for me personally: nice idea, but not fully thought to the end.