It's a good thing we will have a long time to ponder these issues. Really, I think the first facet of all this that needs to be sorted out is the nature of consciousness. Even if I can upload my brain into a machine that will then think like me, is it conscious or not? How could we possibly tell?
You assume that other people are conscious based on their similarity in form, origin, and behavior to yourself. But if you upload your brain into a machine, that similarity is greatly reduced. Is it really a sentient, conscious being, or just an extremely elaborate iPhone?
After that, we can start worrying about what happens if I backup my brain, commit a serious crime, die, and then load my precrime brain into a new body.
"It's only Neutron. We call him that because he's so positive." --from This Island Earth