Likely the resolution on your TV is something ackward like 1368xcrazy. This is one of the reasons I've been waiting for the 1920x1080 sets. The resolution will translate.

What can you do ? You can try to force the resolution of the TV (done through your graphics card) down to something less ackward, but there will still be a tradeoff in either the size of the text or the amount of scrolling you have to do.