The future is here! Toyota's hydrogen-powered cars are go for 2015

http://www.techradar.com/news/car-tech/ ... 15-1212830
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Now that's the one I'm interested in.

Only if they find a way of producing hydrogen sustainably surely?

There's lots of options for that. Gas breakdown with carbon capture, nuclear etc. Plenty of ways to reduce emissions. Like teh article said, as that improves, the car environment benifits straight away. You can't change the environmental output of a normal car once it's been built.

All of which means hydrogen offers an awful lot of promise. Then again, so do other options. Just as you can produce hydrogen from renewable power sources, pretty much any petrochemical can be synthesised using renewable energy.
Take water from the ocean, pull C02 from the atmosphere, add some energy and know-how and you can create carbon-neutral petrol. The really clever part of that solution is that you don't need to build new fuel stations or even make new cars.

I'm cruising the wide boulevards of Las Vegas with Matt Ginsberg, inventor of EnLighten, a smartphone app that can supposedly predict when red lights will turn green.

I'm sceptical until we hit our first red light, whereupon the app displays a countdown and a voice says "at least 60 seconds". The prediction – based on analysing real-time traffic data – turns out to be a few seconds off, but I'm nevertheless impressed that it appears to work.

Ginsberg, chief executive of Green Drive, is showing off the free app this week at the Consumer Electronics Show in Las Vegas. EnLighten feeds off real-time traffic data supplied by cities, then uses a phone's GPS and accelerometer to determine its user's location and velocity.

When it detects that its driver's car has stopped, it combines the location information with current traffic data and generates a prediction for how long the stoppage will be. The traffic light systems in many cities are dynamic and alter depending on the real traffic situation. A few seconds before the green light is set to appear, the app – for iOS and Android – sounds a chime to alert the driver, who can then re-focus his or her attention appropriately.

He went on to explain that manufacturing OLED panels is notoriously tricky and plants just aren't turning out enough sellable screens to bring the price down.
So for a while you'll either have to invest upwards of £5,000 / US$8,000 / AU$8,300 to nab an OLED TV - and be wary of the super-cheap 4K sets that are starting to show up.