I believe the developer said everything that needed to be said about this:
"The app is called iReverse… Although iReverse is fun to play, the most amazing thing about the project is the fact that it runs in all these different environments completely unchanged. In other words, the exact same code base is used to build versions for five different environments. There’s no other platform in the world that can boast this level of flexibility – not even close."
Check out the video where he shows off his app running all different OS platforms and handheld devices including his brand new iPad
This is sweet and I can see a lot of people getting really excited about it already – I know I am