Thought about pedals lately?

Apart from small differences between brands like Look and Time and a somewhat bigger gap to Speedplay and Keywin, pedals are pedals. The bigger choices are between clipless and clip and strap, and cleat forward vs cleat back; all have fundamental influences upon how you pedal and the efficiency obtained. So how about this: a side-mounted pedal system. The makers claim a 3-4% biomechanical efficiency improvement, which is nothing to sneeze at... although it removes all chance of riding in sneakers, doesn't it?