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There are systems sort of like this for PC games.
"Steam" allows me to buy a game on-line and play it on any PC where I can log into my Steam account. The portability is dependent on the Steam servers being "up" but local installations still play even if disconnected from the internet. However... I don't think I can sell individual games. I have seen entire Steam accounts for sale. Those would come with every game ever bought, all or nothing.
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