For those of you that ditched the Hoover for the iRobot Roomba vacuum, the same sort of technology is headed to your lawn. John Deere has introduced the Tango E5, a Li-Ion battery powered mower that will mow your lawn for you. Hit a button, grab your favorite pale ale and put by our feet up while the Tango E5 does a full Vidal Sassoon on your lawn.
Underground wires set the mowing perimeter while built-in sensors keep it away from trees and shrubs...and hopefully Samson, your pet Chihuahua. When the battery starts to run low, the Tango E5 takes itself back to it's charging station for a full helping of juice. It's a mulching mower, so you never have to worry about collecting those grass clippings.
Right now this product is only available in Europe (where it does not have to deal with sprawling, suburban McMansion lawns). Across the pond, it's selling for the equivalent of 3,275 US dollars. That's riding mower territory, so you've got some hard decisions to make on your favorite venue for quaffing that pale ale.