MAP View ALL Airborne Aircraft between two cities

Why is there not a MAP VIEW of airborne aircraft between two cities. i.e. SAT-IAH.
There is often times certain airports go to a ground stop (IAH) and aircraft divert. Once they are released it would be nice to see a MAP view of all aircraft that are airborne between the two cities other than seeing that they are ENROUTE. Im sure we would LOVE to see the VISUAL MAP!!