Is The Universe A Hologram? And Whose Hologram Might It Be?

This doesn't sound scary to me, but more like intriguing:

Do we actually live on a 2D plane, as a holographic projection? There is a well-established theory that states we are indeed living in a hologram, with a pixel size of about 10 trillion trillion times smaller than an atom. This has certain implications, some of which are quite sinister, even unspeakably horrific.

...The point of the Holometer experiment is that it will be able to reveal via the pixelation effect if our universe is, indeed, a hologram. It will achieve this by putting two interferometers really close to each other, creating laser beams and observing possible jitters when they interact.

...There was an influential piece published in Philosophical Quarterly in 2003, arguing that we probably are living in a computer simulation.... The philosophical argument pivots on the point that if humanity continues surviving and computer technology continues advancing, we will inevitably reach a stage where it will be possible to simulate the entire planet and all of its living beings.

At some later stage, creating these simulacra of Earth will become cheap and common — just like building mobile apps. This means that ultimately there will be billions or trillions of simulations of the universe that offer nearly perfect fidelity. Nearly, but not quite, because at the heart of these fake universes there will be some pixelation if you burrow deep enough.