The wireless switches are prone to turning off and on when you dont want them to. I had a wireless switch that controlled a fan in my server room and with all the EMF in the room, it managed to turn the fan off by the next day. THe other technology, which is SLIGHTLY more dependable is X10, but I would still not recomend it. It uses PLC technology [Power Line Carrier] but I have had many issues with line interference. The best solution that I havent tried yet is 'INSTEON' technology made by smarthome, that use a wireless AND PLC transmission to make sure signal gets where it needs to be.
As far as wireless power.... the day that comes around, everyone on this forum will be looking for new jobs because the need for sparkies will cease to exist.
~Matt
