were thin enough, but NEC begs to differ, and it's showing off a new plastic to prove it. NEC's unusual bioplastic -- made primarily of corn -- is unique in that it conducts heat better than stainless steel, allowing manufacturers to forgo the use of other heat-diffusing materials inside handsets. The result is a thinner phone that is far more biodegradable than those whose cases are made from less science-fictiony materials. Paper-thin phones that get hot to the touch? Count us in!