This specific idea is predicated on preventing piracy. If you can't do that, it won't work. And preventing piracy means comparing what someone has on their comp

This specific idea is predicated on preventing piracy. If you can't do that, it won't work. And preventing piracy means comparing what someone has on their computer with some centralized ownership database. And that requires more intrusion in your personal devices than even the NSA wants. The digital economy depends on giving powers to the government that we don't want to give them, and frankly, powers so sweeping that they'd get abused in a second too. Plus we've all seen how digital good concentrate wealth. The top10 games make 50% of all income ? This would make things a lot worse, not better.