Its a 'which world is real?' Type thing. So future vr headset is an updated version of the prototype Terence Howard was working on. She dreamed of the past and he dreamed of the future but they were so vivid, they didn't know which was which. He decided the future must have been a dream, so crushed the headset, putting Anna Paquin in a coma, presumably because the action did something to her brain so she couldn't wake up. Best so far IMO!
He was her 'Character' in the virtual reality, She was racked with guilt and thought her life was too good to be true, So that's what her sub conscious picked up on, Hence her/Terence Howard crushing the headset, which then put her into a coma, because she was in the virtual dream/world when it happened.
Hope that makes some sort of sense? Raised Explained it well, and yes it was definitely the best one by far, I look forward to next weeks