Firstly, you can control all your lights from one device without leaving the couch.

Secondly, you can control them even outside your house.

Thirdly, you can schedule lights to go and off, so you can save a lot of money - this can be a huge saving in an office for example.

Smart lights can also change the colour, hue and brightness of the light, thereby providing the optimal lighting conditions for any time of the day. 

Smart lights can provide both simulated dawns and dusks.

I think the best feature of the smart light is its ability to dim without having a dimmer.

Smart lights can simulate someone being inside a house (using scheduling), which is a great safety feature if you are on holidays or out for the night.

Smart lights can be controlled from a single device like a mobile phone, so in future I could see not having switches on walls anymore.