Most professional tournaments now seem to be played on diamond tables and most all are played on Simonis tournament blue 860HR cloth, regardless if the tournament is played on seven footers or nine footers. The balls do seem to differ, but at least the table and cloth brand (both generally accepted as the very best) usually remain the same.
Also, from the perspective of the spectator, it’s hard to beat. Compared to other sporting events, it’s incredibly inexpensive and often even free to go watch. You can get quite close to the action, and if you make the effort, have the opportunity to engage in a conversation with some of the top pro players, between their matches. What other professional sport could that happen?