New technology is previewed ahead of the Consumer Electronics Show in Las Vegas . Fun - sized cars and smartphone - controlled racing cars are popular . Tiny sensors can be used to track food , sleep , air quality , solar rays and car key location .
New technology is previewed ahead of the Consumer Electronics Show in Las Vegas . Fun-sized drones and smartphone-controlled racing robots are popular . Tiny sensors can be used to track fitness , sleep , air quality , UV rays and car key location .