Looking at MRI signals in visual cortex, researchers were able to reconstruct, with varying degrees of success, the movie clips people were watching (examples below in movie). The most obvious applications we could extrapolate to are for folks who are paralyzed, or perhaps even during dreaming.
What I find most interesting starts around 30 seconds into the movie, when it shows the training movies with the highest posterior probabilities. The influence of the limited training data can clearly be seen. Coming up with an optimal set of training data will likely be a very active area of research in the future.
The study experimentally verifies the Cartesian Theater theory of mind, proving that conscious experiences are simply movies that play in our brains.