The problem with pre-fab is that it does not improve upon what the run-of-the-mill building industry supplies, which is well-constructed houses with finishing problems. The details are in the finish and no one has standardized this or simplified it. Furthermore, I have never seen pre-fab townhouses, and I am a city mouse.
Dwell, so far as I know, is the main magazine to follow developments in pre-fab, they even offer their own branded pre-fab. I just bought a 23 year-old house (my first, and hopefully, my last) and the number of superficial renovations it required and their staggering cost (~$67/sq ft, the uncertainty is in the area not the cost) was just amazing. Down the street, the McMansion specialist Toll Brothers has a development of new houses that they are building as they sell them, and already I hear terrible things about finish problems (ie floors, doors, etc NOT concrete, foundation, beams, etc).