AppleTV now provides smooth music transition. When listening to a song on your stereo, and leaving the house with your IPod, the song just played in ITunes continues on your IPod and if you come home, the song playing on your IPod continues on AppleTV.
Arguments: AppleTV and other Apple-Products will be more and more connected, because this will raise the value of the components and make way to new applications like this music transition. Moreover it will lead to a lock-in for the customer: if all the entertainment-products in the household are from Apple or compatible with Apple products, the generated value of theses communicating products will be higher, than if the products can not communicate with each other. Therefore the customer will prefer Apple-compatible products.
See also IPhone is a remote control
Questions: What other useful applications are there if you connect AppleTV, Computer, IPhone and IPod (and other devices)?