I personally dislike the fact that copyright is tied to the person rather than the release year. It results in a lot of ugly compromises in copyright. The idea behind authors life + 70 years is that you don't want to discourage old people but if copyright was based on the release date none of this would matter.

70 years is way too much. It should be something like 10 years. The idea is to give creators appropriate reward and then release works into the public domain. 10 years is more than enough time to make a fortune off of one's creations. They should have to invent new stuff if they want more money.

What happens today is creators want to strike gold once and then enjoy a lifetime of royalties for themselves and their children. When was the last time something entered the public domain? Probably in the early 20th century. Public domain might as well be a forgotten footnote of history. There's no reason for the public to recognize copyright as legitimate when it's being systematically robbed of its rights.

What if the copyright is owned by a company? I don't know. Do they have to go bankrupt for the 70 year count to start? In any case, they'll probably just lobby for even more extensions before their terms run out anyway.

Also, none of these companies would even be able to sell old games if it weren't for amazing developers writing the emulators (and people playing pirated games on them). All these games would be lost forever.