I am creating an RPG style game that uses tilemaps for it's graphics. For example I have trees and rocks that the player cannot walk through, I have pokemon style grass that have a random chance of starting a battle when walked over, I have doors and entrances that act as links to new rooms/layouts.
Right now I can do all of this easily and accurately by creating invisible sprites and placing them exactly over the relevant tiles, then tying the events to collision of the invisible sprites. The problem with this, of course, is that I actually have to keep creating and placing all these invisible sprites, this takes time and it would be easy for me to make mistakes, placing them incorrectly or forgetting to place them in places!
So yes. It would be extremely useful if I could tie an event or behavior to each tile in the tilemap, following the above examples, I would make all tree tiles have a solid behavior so the player cannot enter that tile.