Peugeot has unveiled the new HX1 plug-in hybrid concept which the French automaker hopes marks the future of MPV/crossover vehicles. The HX1 is a low-slung MPV/crossover that seats 6 and utilizes Peugeot's HYbrid4 technology, and features an all-wheel drive diesel-electric hybrid system. Peugeot hasn’t announced any production plans for the HX1, but the company is moving forward with two other HYbrid4-powered vehicles.