(flashing mathematical credentials) Okay, I was hoping this would die quietly, but sinces it isn't.... GUT is a physical theory. If true, it is believed, it would be possible to manufacture a computer which excedes a Turing machine in several important ways. In particular, it is believed that a "quantum computer" could perform certain NP tasks (factoring) in P time. BUT, as I read it, this has _nothing_ to do with the P/NP question. It simple creates a new area of inquiry, the QP/QNP/QNP-complete area. (The first qu question being wheather some of these sets are empty.) The P/NP question is a question about Turing machines, and as such, would not be affected by the creation of a non-Turing computer. As for boundaries... GUT _might_ give us a single equation that contains all physical laws. But so what? We can't even solve the three-body problem for gravity! Chaos is an emergent process. Have fun.