My prediction for the future of personal technology (provided we don't run out of cheap non-renewables beforehand and/or don't destroy ourselves in any number o

My prediction for the future of personal technology (provided we don't run out of cheap non-renewables beforehand and/or don't destroy ourselves in any number of plausible scenarios) would be on-demand energy generation in a compact solid-state or completely enclosed device. Some sort of harnessing of one of the primary forces converted to electromagnetic energy for consistent, convenient, non-explody, on-demand power for our bionic limbs and ad-supported Meta-eyes and A.I. powered babysitting robots.