It appears that Apple TV uses a cut down version of the Mac OS. Considering that it will usually be connected to the Internet, does this mean that virus protection is required? How would you go about installing and configuring a virus protection application? Actually, there could be a market for third party applications for ATV that can be operated through the Apple Remote (rather than requiring a keyboard) and have a UI that can be read from the other side of the room. The full Mac OS (and the same goes for Windows) is quite diificult to operate from a metre or two away.