If you observe, products that were built not only to help with our day-to-day tasks but also was applicable to the majority of the population have gone on to changing the world. As you mentioned, first it was the computers, followed by the internet and then the smartphones. However, I feel that AR, VR and IoT might not have the same impact as they cater to a very specific need. IoT is an example for that as it has not lived up to the hype and same goes with the VR headsets. I am not sure how a common man would use a VR headset every day just like how we use the internet, a smartphone app or the PC itself. Nevertheless, we could still be in the gestation phase and I could be wrong.
But among the emerging technologies, AI seems to be the next big thing.