Original Comment by: Thomas Crymes
You say the characters cease to exist after the level is over, but I'm not sure I agree with that. I think the instant the character takes form in your mind, that character exists, and every time you think of that character, he/she winks into existence, if only in your subconscious.
I know you are concerned with the data as it resides in memory, but I think it goes beyond that. A DVD player only knows what is being displayed at the moment. The viewer keeps the world in his/her head, and in that head the characters exist and are persistent.
Nevertheless, I liked the article, and it is nice to know that game designers are endevoring to put that level of detail in games.