Yes, we may be able to rival the raw computational output of the human brain today (for a few key comparisons, see the tl;dr in this thread
) -- but can we do it efficiently?
"The human brain uses only about 40 Watts of power when it's awake. That's comparable to the power consumed by a lightbulb. Meanwhile, my newly-built $1500 custom desktop PC's power supply can supply about 750W. A typical microwave oven uses 900W or more; a refrigerator uses in the same ballpark."
--From my blog