I currently have smart bulbs. Living in the UK we don't have the required neutral wire that most switches need. The ones here that don't need a neutral are either very expensive or don't match my plugs. My preference is for smart bulbs anyway. As others have said, a smart switch will turn on or off dumb lights and that's pretty much it. Whereas, smart bulbs can be individually controlled, colour, colour temp, saturation, zones etc. I have Lifx WiFi bulbs and have each bulb set for different times of day, different moods (via a smartthings button). I can have the ceiling lights off and all the lamps on etc. Impossible to that with a single smart switch. All that said, I will in installing LightwaveRF wall switches for my dumb rooms (both bathrooms and kitchen).