Nothing lasts forever: things wear out. However, there is a huge pent up demand for "perpetual" autonomous drones for everything from security to surveying, meteorology and even power generation.

IDTechEx finds that the construction, agriculture and mining part alone will be an $81 billion market in 2027 with considerable opportunities for consolidation of players and technological breakthroughs with major market disruption and creation.

A prediction by analysts IDTechEx is turning out to be true.The window of opportunity is closing for fuel cell on-road vehicles to become mainstream.