The massive TV audiences are relative football new comers; China, India/Asia, even the US and Australia.
Thats the global driver for whoever broadcasts the matches.
If those markets hold up, then all fine and dandy, cos there is not a chance in hell that the traditional football strongholds can cough up enough in subscriptions to get close to the sort of deals we now have in the PL.
And then there is the landscape of how, exactly, football will be watched in say 10 years. Be honest, 10 years ago, who predicted that millions would watch football on their phone. In China.
Daft to think in 10 years time we will be using "old" technology.