2010 Toyota Prius has made its official debut at this week's Detroit Auto Show. The company estimates it'll have a 50 MPG rating -- up from 46 MPG in the previous model -- and there's a bigger, 1.8-liter four-cylinder engine for improved highway mileage. In addition to Power and Eco driving modes, EV Drive will let you run on battery alone for about a mile, which if nothing else should provide a little extra push for getting to the gas station when you've held off for too long. One of the coolest (literally) new features is the optional solar panels in the moonroof that will generate power for circulating air and keeping the interior temperature from going too high. If that's not enough, there's a remote-controlled A/C system that can run on battery alone and lets you set the temperature before you get in. Check out the read link for more specs and the full press release.