Tesla swept headlines this week by launching a groundbreaking solar roof tile that's better looking and longer lasting than standard shingles. The technology could trickle down to the company's cars too -- Elon Musk hinted that the upcoming Tesla Model 3 could feature a solar roof that melts ice and snow while generating energy from the sun. Meanwhile, legendary automotive designer Henrik Fisker finally unveiled his EMotion sports car, which will be able to drive 400 miles on a single charge when it launches next year. Nissan debuted the first all-electric mobile office, which is housed in a beautifully renovated e-nv200 van. And a Chinese company is getting ready to launch the world's fastest maglev train, which will be able to hit 373 miles per hour.