Not all the channels will look better persay.... The non HD channels are still broadcast over satellite in exactly the same way, using exactly the same bitrates. The only difference is the box outputs them via HDMI (digital interface, like scart carries sound and video, but fully digital - much higher bandwidth - uncompressed video, up to 8channels of uncompressed audio etc). The upscales non-HD channels as it outputs a master resolution of 720p, so anything non 720p neds to be up (or down, tho nothing is broadcast in the UK higher than 720p yet) to fit the resolution. This shows some improvement, but not a whole lot. What it does do is reduce the ammount the TV needs to upscale, as the TV is being fed a 720p res constantly.