I'm sure someone has already thought of this, but:
I was building a map using the new Dengeon Tile Master Set last night. I was making a sort of temple in the middle of an illusory garden and I needed puddles of water. I scrounged through the whole set and found all the water I could find and made a passing map, but I really wished I had multiples of one of the really excellent tiles that was exactly what I wanted. I despaired about buying multiple sets to have exactly what I needed...then it hit me.
Why rely on the physical tiles when the magic of photoshop is at my fingertips.
Since I have already purchased the tile set, I can take the tiles I have and do a high res scan of each one. I would be building a stock photo resource of sorts. Then whenever I want to build a map, I just pop open photoshop and start slapping in whatever I need in whatever multiples I require. Then when I'm finished I just use one of those tiling applications that magical place the internet offers and I print out one big paper map that is seamless, easy to carry, has everything I want, and won't get jostled on the table.
Obviously I would be paying out in ink, but the idea of having a fully modular and endless database of the beautiful tiles based on what I already own makes me all giddy inside.