This is a fascinating discussion. Many of you are saying the same sorts of things that I've thought of or that have occurred to me over the years.
That visual comparison is interesting because it is actually forcing me to change my perception of which cities in Texas are the largest as a matter of general knowledge. The idea of Austin as equal in significance to Dallas and Houston is another foreign notion that I'll have to become accustomed to.
I can also foresee downtown Fort Worth surging to catch (or even surpass) downtown Dallas at some point in the future, what with its exploding population as of the latest census estimates, lack of large suburbs nearby on the same level as Dallas and the upcoming development potential once the Panther Island project is complete.
And what's to come of El Paso? Or Corpus Christi? Or Lubbock or Midland, etc.?
Lots of potential!