What we've shown is that people with amnesia really are stuck in the present. They can't recall the past, and now it seems that they can't even imagine the future or indeed richly imagine even fictitious experiences.
Eleanor Maguire of the Wellcome Trust Centre for Neuroimaging at University College London as reported in the brief National Geographic news piece: Amnesia Destroys Imagination as Well as Memory, Study Finds
What are we if we aren't our memories? What can we become if we can't imagine it?