Two very different verdicts Friday on the future of mobility.

In Japan, Toyota is doubling down on vehicles powered by hydrogen fuel cells.

It unveiled a new version of its Mirai car on Friday.

The automaker has been working on fuel cells for two decades.

Such cars emit nothing more than water vapour.

And Toyota says they beat electric vehicles on range.

The new Mirai can drive about 560 miles on a full tank.

But the cars are costly to make and buy - over 46,000 dollars in Japan, after subsidies.

And hydrogen filling stations are few and far between.

As a result, Toyota has sold fewer than 10,000 Mirais over five years.

By contrast, Tesla aims to deliver up to 400,000 electric vehicles this year alone.

Meanwhile, James Dyson is calling it quits.

The British entrepreneur is scrapping plans to develop an electric car.

Dyson says he has a great design, but can't see a way to make it commercially viable.

Attempts to find a buyer for the project have been abandoned.

As Tesla's persistent losses demonstrate, building a profitable car company from scratch is no easy task.