If gog.com went away tomorrow, downloaded games and installers should be copyable to another PC relatively easily (so far this has worked 100% for me at least).

I'm not sure how easy it will be to copy downloaded games to another PS3 once Sony pulls the plug on the PSN store (and likely PSN login) for PS3 next year.

This is just straight up false. Laws don't cease to exist because of a liquidation. Legal rights absolutely matter in the event of a liquidation, and will be part of any liquidation process.

For example, if there was a law that the entire source code (including server code) should be immediately put into public domain if the game maker is unable to meet their obligation of serving up the game due to liquidation, then the release of the source code would be a legally sanctioned part of the liquidation process.

And just like that, you're part of the problem