AGI = artificial general intelligence (computers that can solve problems and do other intelligent things as well as any human)

FDVR = full-dive virtual reality (immersive digital experiences in which you fully “dive in”, as real as the real world)

BCI = brain-computer interface (tech that enables direct communication between the human brain and computers)

AGI is speculated to help us in inventing BCIs (since the brain is too complex for us to figure out on our own in the short-medium term), and BCIs will enable FDVR by directly interfacing between the brain and virtual worlds.