LA is way off. I'm not sure LA's circle touches LA at all. It's like they put it half way between LA and Phoenix
Houston is undergoing a boom and level of growth not seen by a major city in a long time. It is easier to get wealthy and have a high standard of living than another place I have been. Houston has more Fortune 500 companies headquarted than anyone other than NYC. There are more exports from Houston than anywhere else in the USA. The geography, workforce, etc all lead to Houston breaking into the top 3 cities in the USA. Chicago is a great city but has serious problems.
That's good, because "Houston, which is now the country’s most racially and ethnically diverse metro area".