What happens to America as its largest generation ever gets older? Walker Smith says get ready, because Baby Boomers are not going home to retire. Instead, they will be out seeking their next new adventure. Walker is with us to tell us what he's learned about aging Boomers and his new book, Generation Ageless. Walker is president of Yankelovich Partners.

Bonus Audio -- Click here to listen to more of our conversation with Walker Smith.

Mark Stern has new evidence from Philadelphia that cultural activity in a neighborhood is derived, in part, from diversity and leads to increased land value. Mark has labeled the phenomenon Natural Cultural Districts, and he's here to tell us how cities can take advantage of the opportunities they present. Mark is a Professor of Social Welfare and History and Co-Director of the Urban Studies Program at the University of Pennsylvania.

Bonus Audio -- Click here to listen to more of our conversation with Mark Stern.

Plus, Keith Bellows, editor of National Geographic Traveler, will give us the inside on Phoenix and Tokyo.

That and more on this week's Smart City.