Take for example an interview that Elon Musk had where he was asked about if he believed machines learning could eventually lead to the end of humanity, he stated that his worry was more that the machines learning have a high probability of replicating or mimicking consciousness. A while back, there were a few videos on Facebook about a virtual reality, where this person gave you a first-person view of themselves walking, jumping from rooftops of big skyscrapers to rooftops. The intriguing aspect of it was the peculiar feeling this video evoked as if you were going through this all while comfortably sitting on your couch and watching the video through your computer screen.
I say that to say this if virtual reality can have such a distinct effect on the actual brain, imagine having the access to relocate your world in a virtual space. What then? when this consciousness is learned and you can be subject to it unbeknown. One of my favorite scenes in the matrix is when Neo realizes he's been living in a virtual world the whole time. Plugged to the machine and fed consciousness. Nothing real can be threatened but first, we must establish realism in a virtually evolving universe while we watch. What Elon Musk theorized was if such a scenario were to be, then it's fair to assume it's been replicated and perhaps we're in it. There are a lot of theories and beliefs out there, I just hope to enjoy this moment and be happy in the reflection.