The fact that it's heterogenous kills it for me. Remember the Cell Broadband Engine? You could get some pretty crazy performance out of that thing, but nobody u

The fact that it's heterogenous kills it for me. Remember the Cell Broadband Engine? You could get some pretty crazy performance out of that thing, but nobody used the execution units because the instruction set was different. GPUs get away with it because they are really a completely different kind of processor, but even there GPU processing is under-utilized for this reason. It's really a pain.