Control your light environment from your iPhone or iPad. The starter pack is available for 199$ and in Germany for 199€ via the Apple online store. I’m not aware of the opportunity to buy them in the retail store, but maybe they have the Hue in stock too.
http://www.meethue.com/en-US/buy
http://store.apple.com/us/product/HA779VC/A/philips-hue-connected-bulb-starter-pack
Light automation without the need for an additional home house bus system like KNX / EIB for example.
„KNX is a standardized (EN 50090, ISO/IEC 14543), OSI-based network communications protocol for intelligent buildings. KNX is the successor to, and convergence of, three previous standards: the European Home Systems Protocol (EHS), BâtiBUS, and the European Installation Bus (EIB or Instabus). The KNX standard is administered by the KNX Association.“
http://en.wikipedia.org/wiki/KNX_%28standard%29