Just broker speculation but thought I would share:
Grocery stores will soon have little choice but to breach the downtown market, which has a large-enough mass of residents to support a grocery store, Gaines said. He's skeptical of Randall's, Kroger or Walmart taking the risk of building an urban, multistory grocery store in downtown Houston.
"I think H-E-B definitely will," Gaines said. "Whole Foods will."
https://www.bizjournals.com/houston/news/2017/11/01/broker-downtown-houston-has-enough-residents-to.html