The Internet of Things is an evolution of the Internet. It interconnects not only human and computer as before but also physical objects (things). Things can be home appliances, vehicles, industrial facilities or potentially everything we interact with daily.
If you want to implement your own project ideas you can use the Bindings for the Remote Switch Bricklet and as appropriate integrate other Tinkerforge modules. As an example a light or temperature dependent controlling with the Ambient Light or Temperature Bricklet is very easy to realize. The case of the starter kit does have additional holes for the Ethernet Extension, which can also be easily integrated. With the Ethernet Extension you can go without a Raspberry PI or similar that is used as a gateway.