The limitation is the DVD 1. It only has s-video and composite video outs. Running either to the TV directly wouldn't give you a better picture. In fact it might be worse because when connected to the BeoSystem 1 the signal passes through a line doubler.
B&O do make a SCART to RGB cable that could go to the TV but it is really not needed because the DVD 1 still only output 480.
Dixon