I would like to see someone market a standard looking (toggle) light switch with z-wave or zigbee. I really dislike the appearance of decora and the Aeon labs modules scare me with the tiny screws to attach the power wires. I have seen them for insteon but not z-wave or zigbee.
Also, would like to see a good looking remote (z-wave or zigbee) doorbell button. All the wireless doorbell buttons seem to be cheesy looking plastic.