For those of us that paid for FSD, won't they at some point have to update us to MCU3 in order to run the FSD visualizations?
The visualizations work now, so unless you bought FSD in a Tesla pre March of 2019 (when tesla actually changed the definition of FSD), the only thing tesla will owe you is what the coming "city streets" function. Once that is delivered to anyone who bought FSD after the changing of the packages / definitions (march 2019) is fully delivered on what tesla promised to them.
Short answer, no, unless you bought FSD under the old definition, and even then it would be because you are missing some FSD feature that others got. The media computer isnt the car computer, either... even if they are on the same boards they are different services.