Imagine thousands of millennials taking their places alongside tourists and conventioneers on the famed San Antonio River Walk. On March 22nd, we called attention to San Antonio’s new tourism-marketing strategy “San Antonio Stories,” which aims to attract the creative class to the Texas city with promises of seeing (and hopefully joining) an artistic and inventive beehive. Last week, My San Antonio (the San Antonio Express-News online) reported the results of a city-commissioned study as part of SA2020, a blueprint for how a city best known for the Alamo and the River Walk might look eight years from now. Much of SA2020 focuses on improving many facets of residential life in a city that has in recent years begun to address its longtime dependence on tourism and the military for a…