There are dozens of ethical concerns involved with created an artificial human conscious. A completely selfish concern of mine is this: Once the hard work of emulating a human brain is done, what's to stop the emulation from running at 10 or 100 (or many, many more) times as fast? If this is a human brain, replete with arrogance, in what way wouldn't it be right to feel superior to me? If you had the option of hiring normal speed brains vs ultra high speed brains, which would you hire? How long would it take ultra high speed brains to completely take over?