Toyota put the auto industry on the road to electrification in 1997 with the first Prius hybrid. Then, in 2015, it debuted the Mirai, the first production hydrogen fuel-cell electric vehicle (FCEV) offered for sale to retail customers in North America (Mirai means “future” in Japanese). Now, Toyota has revealed the second-generation Mirai, rebooted as a premium sedan with cutting-edge desi...