DrKnow will have to answer that himself, but from PMing with him a bit I think a lot of it is just about doing it because it's a cool concept. Not extremely practical or necessary, but cool nonetheless. I love stuff like this. Also, trying to completely get rid of fans.
I was looking at some of the little radiators TCS has, they are pretty neat. I could mount one of these right on the front bumper of my 1/8 GT, put a cut out in the body with a little mesh for debris protection, and it would look just like an intercooler on a real 1:1 car, and have plenty of airflow with no fan needed.
http://www.micropumps.co.uk/TCSAccessories.htm