In the average home these days, you'll find many devices, systems and appliances, including everything from lighting and heating to AV systems, security and other consumer electronics, each one of them controlled by it’s own switch, app, remote control, or motion detector etc.
The problem is that none of them are able to communicate with each other in order to meet the needs and demands of the homeowner - not particularly smart nor convenient!
In the Smart Home, by contrast, everything runs together from a central, intelligent nerve centre:
This means that a single, simple motion detector or switch could control not just lighting, but also the alarm system, heating, music and so on. Say goodbye to isolated devices!