The guy who did the experiments from which people come to that conclusion doesn't necassarily agree.
Some take this as evidence against free will as the cause of our actions, and some do not feel O.K to go that far yet. As technology improves we can predict with more accuracy what that "stuff" might be telling us, but as Haynes noted there is a difference between finding brain patterns that are predictive of our actions and ones that determine our actions. It will be a long time before we have a definite answer as to how exactly real-life decisions, which have greater importance than deciding to press a button, work.
