If they simulate my brain molecule by molecule, and consciousness emerges, which one is really me? If my physical self is then killed, do I in fact still exist inside the simulation? In which case, is it OK to kill off my superfluous physical presence in order to use my organs to help others? What rights does the simulated me have?
Okay, these guys aren't anywhere near simulating an entire brain molecule by molecule. There's a big difference between this and being able to simulate the storage of a memory.
Also, the estimates of the total complexity of the brain may have all been greatly underestimated. We now have strong evidence from evolutionary Proteomics that each synapse has considerable complexity and is itself involved in computation. This makes perfect sense: the synapse must have evolved from the molecular sensing and navigation mechanisms of single celled Eukaryotes, and these are clearly capable of some computation.
I'm just extrapolating. Given exponential increases in computational power, it's a pretty small jump, I think, to imagine full brain simulation from what they're doing.
This will be a huge can of worms one day.