I said before that it is a shame that PowerPoint (or Keynote) do not have these powerful replicators that you can find in motion graphics software. Filter Forge is a nice piece of software that plugs into PhotoShop and extends the range of filters you have available for your images.
Here is an example image I created for a client that has software that works across all possible versions of the highly fragmented Android mobile operating system.
Filter Forge is a platform on which users can contribute their own filters, the result is an endless library of filters, including the perspective distortion above, instagram-style retro filters, and filters that turn your images into cartoons or impressionist paintings.
It is not cheap, I bought the professional edition which is priced at $399.