Toyota is making significant strides in the development of hydrogen fuel cell technology by working on a third-generation system that promises double the power and increased efficiency without a size increment. The new system, set for a possible launch in 2027, targets Japan's heavy-duty commercial vehicle sector and may also find its way into passenger vehicles like a future iteration of the Mirai. With plans to enhance durability and reduce costs, Toyota aims to position the new fuel cell on par with diesel engines. Despite challenges like the scarcity of hydrogen filling stations affecting the success of the Mirai, Toyota remains steadfast in its commitment to hydrogen power. The company's focus on commercial vehicles reflects its belief in rebuilding the hydrogen story, as expressed by Thiebault Paquet, Toyota's hydrogen chief in Europe. Other automakers, including Hyundai and BMW, are also investing in hydrogen fuel cell technology, indicating a growing interest in this alternative fuel source.