Over the years, people like Bostrom, Smoot, Kurzweil and many others, have claimed that based on statistical probability theory - this is like a Drake-equation argument - it is not unreasonable to assume that an advanced society with tremendous computer sophistication has already, or could one day probably, and more than likely, create such holographic simulations. They say in all likelihood this will eventually apply to us as well. It all has a lot to do with computer speeds ramping up by orders of magnitude, as well as knowing that the brain operates on frequencies that transpose and decode sensory information from receptors with such rarefied sequencing ability that super-fast supercomputers will be required to allow us to replicate and program it. Currently, claims by prominent philosophers and scientists routinely state that we are on the verge of understanding how we might create a holographic universe simulation, or already be living in one. This is all a fancy way of saying that we do not know what we are talking about yet, but we wish we could provide evidence for living in a holographic universe.
In other words, these arguments may not be based on any unknown physics, but they are explicitly based on unknown psychology. The logic of human perception is the forgotten element in these discussions. Without a human being engaging in a meaningful perception of the world, there is no awareness, no logical ability to make predictions about our environment, no self-awareness, no real relationships, no meaningful social interaction, no science - no sentience.
It's all about perception.
In order to understand how to create a holographic experience of sentience, we a need logical brain-mind theory. If we just say that the whole issue is moot since the real trick is to manifest holographic dynamics, then we sidestep the brain-mind theory altogether. However, holographic possibilities in and of themselves do not mystically create an experience of a mind. Holographic theory does not replace a brain-mind theory, it just necessitates a coder with a sound, logical model explaining how brains become minds on a level of digital technology.
In some sense, anything could be replicated in a holographic simulation. Science has been avidly using simulation engines since the sixties. That may be why so many scientists are so comfortable with the whole idea of simulations to begin with - an enormous amount of science is done using simulators. However, there is one singularly important thing that eludes explication and that is the psychology of perception. That is what eludes us to this day - a real understanding of the logic of meaningful perception and sentience.
No one has been able to describe how someone would simulate the experience of being self-aware. Similarly, many of the world’s greatest philosophers and neuroscientists have already agreed that we will never be able to devise a brain-mind theory because we are not smart enough. They call themselves the Mysterians, and they say the brain has not evolved enough to understand itself. It is difficult to believe, but many of the world’s smartest brain neuroscientists, and philosophers have agreed they are not smart enough to understand how the brain becomes a mind, and they do not think anyone ever will be smart enough to do it.
This is more than ‘philosophical-puzzle time’. This is the bottom line issue at stake. The ability for an individual to be aware of themselves is the single greatest accomplishment of the reality we share. It is also the single greatest mystery we can entertain. The entire tower of science, from the dungeon to the penthouse suite, is clueless. Scientists routinely applaud our ability to explain the whole universe without addressing the sentient mind very much at all. Even psychologists, sociologists, anthropologists, and linguists tend to focus on specific behaviors at the risk of getting lost in the brain-mind-theory sauce. Yet, the current state of science notwithstanding, a holographic universe simulation would be a completely meaningless phenomenon without top priority given to hosting the brain-mind dynamics of reflexive awareness.
Unless there are sentient people in the simulation experiencing self-awareness, it is certainly not worth more than any simulation we are capable of creating today. It has no intrinsic interest, purpose, or satisfaction. It is just an advanced video game simulation of cartoon people playing around. In other words, holographic simulations are meaningless until and unless we can first explicate in deductive logical terms how a simulation would replicate or create the meaningful human experience of being a sentient, self-aware creature. Anything else is just cartoon time.