I don't understand the proposed solution about data portability? Everyone is going to buy a Steam machine and run it from their home? My municipality is going to open up a datacenter for me to store my data?

What happens when data is shared between Meta + Google? Now it doesn't matter if my data is portable, every player has a copy. There is a need to first establish a data pool (not one but a whole city of people's with private data pools) first before big companies will come asking you for it. How do we get there if all of our apps are designed for us to dump data into their mega pool?

Your Steam games aren't really portable though.