"The answer is that although the chip ran three times as fast and used half the electrical power as clocked counterparts..."

I thought another advantage was that it modularized chip design to some degree - ie you can improve individual sections to run much faster, without having to make the entire chip run at that speed - http://www.cs.virginia.edu/~robins/Computing_Without_Clocks....

In any case in a similar vein is TTA (https://en.wikipedia.org/wiki/Transport_triggered_architectu...) which I think Ivan Sutherland was also involved in, but maybe I'm wrong about that.