There are many (purely speculative) possibilities:
- Free energy is available right now
- Humans have been genetically engineered by NHI
- Humans can't compete with NHI for dominance
- Our reality is not what we think it is (different dimensions, parallel realities)
- Previously impossible things because of limited understanding of our reality and physics could suddenly be proven possible. Like telepathic communication, remote viewing, time travel by warping spacetime)
- If our reality turned out to be a simulation, the majority of people would probably have a huge meltdown and start acting in an unpredictable and hostile way