Design a feature for self-driving cars.

I'd design an adaptive "ambient experience" feature for fully autonomous vehicles. This system would dynamically adjust the interior environment – lighting, soundscape, temperature, and even scent – based on the passenger's detected mood, the time of day, and the journey's context (e.g., a scenic route versus a commute). For example, it could create a calming atmosphere for a stressed commuter or an energizing one for someone heading to an event. This feature aims to transform the car from mere transportation into a personalized, responsive sanctuary, significantly enhancing passenger comfort and well-being during transit.