Pardon the pure optimism a few moments more... but a world with mass solar power, absorbing the suns energy, powering batteries, robots maintaining almost all of these devices and recharging themselves, helping to farm, clean, do dangerous work, deliver food, build buildings, repair roads, synthetic materials nearly as good as wood and non-renewable resources... The transition to this world will be like the integration of the internet into society. Rife with problems and vulnerabilities, but would we ever go back to a world without it?