One of the first programs I ever watched on an HDTV was the Krispy Kreme Challenge, an annual race in Raleigh, North Carolina, where contestants eat a dozen glazed doughnuts and then run 2.5 miles. I watched runners puking up sugary dough in startling high definition. But my primary thought remained, “I could really go for a glazed doughnut right now.” That’s how good they are