This is nuts, being able to reconstruct what the brain is thinking via fMRI examining brain activity. Right now it doesn't look like much and can only be used on what the subject is actually seeing but researchers hope to be able to recreate memories or dreams with this method.
I don't know if I want to be able to see what some people dream or are thinking about, but imagine this technology being used in a trail. Who needs witnesses if you can extract the memories of the accused.