SpaceX is only now getting ready to launch their 2nd generation satellites for its Starlink internet service. Now though Elon Musk has announced that a 3rd generation satellite is in the works that should start launching in 2024.
You can see Elon Musk mention the new satellites in his talk on Twitter from back in October:
Very little is known about these 3rd generation satellites, but the are expected to be an improvement over the current models being launched. Much like the 2nd generation satellites their futures are likely tied to the success of the new Starship rocket that is currently being tested. Once that is approved SpaceX will be able to launch these larger more powerful satellites.
SpaceX has permission to launch 4,408 2nd generation satellites from the FCC. It would need to get approval from the FCC to launch a new 3rd generation satellite.
The big selling point for the 2nd generation satellite is the ability to handle even more demand compared to the older 1st generation. As the number of Starlink customers grow the ability to handle higher demands of traffic will be important to the future of the service. Hopefully the 3rd generation satellites will continue to be able to better support higher demand from more customers.