Hands full of groceries? LG has a refrigerator that opens automatically when a person steps on the projection of an image on the floor.Its LG Signature fridge also lets you peek inside without opening the door, saving electricity and maybe keeping you from making a poor decision regarding a late-night snack. One side of its double doors has an opaque glass window. Knocking on the window lights up the inside slightly, enough to glance at your leftovers.And of course, it comes equipped with Wi-Fi enabled sensors so you can track the temperature inside and monitor energy use.