What a fascinating challenge: four architectural firms, BIG (Copenhagen), INABA (Los Angeles), MAD (Beijing), and Mass Studies (Seoul) have been invited to submit a new city scape, but in a scalable form. What does that mean? Well, a city block design can be scaled down to a sitting area in a public space. Or a building can transformed from urban center to a toy - all just by changing in size.

Implications - This bold challenge is really remarkable because many people recognize that current urban centers are going to need to adapt to the shifting demographics of the future.