How so? The technical answer to this problem is that it must always be possible to store games and media on media that you physically own, and load these on the gaming device in a completely offline process that does not depend on having an account.

I don't think blockchain has any application here. You already have a receipt of your purchase, and noone is disputing that, so blockchain would add nothing but an extra layer of complexity. The problem is that the rights that follow with that purchase does not match what consumers would naturally expect.