I recently walked through a home that had some great updates. A centralized, wireless, remote system capable of controlling the entire home from a simple remote or slick IPhone interface.
The products are available from Control4 and they are installed easily by the average person to add never-before seen control over the home. A simple web-based interface allows users to turn on lights, adjust heat, turn on televisions and control lighting throughout the house without entering the front door.
Check out this video below, this stuff is way cool!