Hi, Wondering how the output of Apple TV at 720 is handled by an 1080p TV. Is the image scaled to the size of the screen by the TV? I read the specs of some top range TV's and they seem to do a 720 to 1080 conversion/upscale, unfortunately I will be looking an an entry level TV (sony KDL 40W2000) and this functionality is not available. What should I expect, a letterbox image using only part of the screen, or a scaled image? Thanks.