How it can be used
As it stands it seems like the near majority of the available rmxp games are an aesthetic line. Point A to point B. Breaking the mode making it so that any menial event can dramatically change what happens at point B can change the aesthetic line into an aesthetic ray. Point A B can become A, B, C? now even though you're limited (by choice) into a 2d world, having a story with a 3D premise can change the perception of your game.
Little susy found a match. The hero is in the town for a day and left a match in the town after smoking a cigarette. Little susy burned down the town and killed everyone in it. At the same time later on in the game Paul would have helped the hero fight the antagonist and Mary would have provided support in some way. Now Mary without Paul is grief so she decides to overthrow the current antagonist and she is the new antagonist. This in turn causes the antagonist to be murdered and the oppressed public to be overjoyed. The public blindsighted about the new threat sees the hero as a threat to the serenity of their land. The hero becomes the new enemy and the roles are reversed.. all thanks to a little match that was carelessly left behind.
What it can portray
A two hour long game can easily become a six hour game and the repeatability of the game skyrockets.
How it can be surpassed
I'll leave it up to you.