To offer a bit of style to a game I've been working on, I have blurred the bottom and top halves of my map, and when the player characters are on those blurry sides of the map, they appear blurred as well. This simulates a "tilt shift" photo effect, which is awesome, and it looks pretty cool (also, I learned that the new Link's Awakening game is also trying to simulate this effect, so ... I guess "great minds"?).
Sadly - it eats up a whole bunch of my time creating switches to change the character to blurry, then back to normal, and it also means having to make that effect for events that wander into the blurry areas as well, and i am starting to realize that this could be done a million times easier if there was a plugin with a tiltshift filter.
I think it should be possible as I have seen plugins which offer a "blur" effect on the entire screen, so how hard would it be to do it to just the bottom and top of the screen? It would have to be gradual though, like a gradient of blur, otherwise it'd look weird.
For those unfamiliar with tiltshift photography, I have included some samples taken from the web, as well as examples of it done in the upcoming Zelda game. The illusion caused by this simple effect, is that it makes everything look like it is kind of miniature, like toys.