What is lacking is a neural link, since using gloves and external gadgets to try to trick the brain into thinking its experiences are real will always fail an i

What is lacking is a neural link, since using gloves and external gadgets to try to trick the brain into thinking its experiences are real will always fail an immersion test on some level. A neural link would directly stimulate the brain to directly experience the sensations of the virtual world without directly feeling the impacts of attacks or fall damage, and aside from uncanny valley issues that is the last great frontier of computer gaming. It is also the difference between what we have and what Ready Player One had. If all of human science and effort were bent on creating neural link technology like that I would guess it would take us at least 20 years to pull that off, so if that ever happens I'm sure it will be long after we are all dead and gone.