Read more carefully what it does. It's a geometrical representation of the process by which particles turn one into another as they interact. It's a much simpler representation of the same process that is already described by Feynman diagrams.

[link to en.wikipedia.org (secure)]

Amplituhedron only simplifies mathematical description of how the 12 bits of spacial geometry shift and roll as they interact with other bits. It doesn't predict anything new or not already known, it simply allows computational/simulation models of reality (like Quantum Gravity simulations) to be calculated much faster than they've been so far.