The hope is that this analysis would result in a greater understanding of how matter and energy behave inside of a black hole, a problem that's at the heart of understanding how quantum physics and general relativity interact. One major question about black holes has been whether the quantum information that falls into them is lost, or whether the information is retained in some format. (Quantum physics dictates that information can never be lost.)
One curious prediction of the simulation is that the distortion of space itself would make it impossible for humans to actually perceive distances, because our binocular vision (using two eyes to triangulate distances) would no longer do the trick. Instead, beings with three eyes would, in principle, be able to compensate for the distorted distances.