HDMI does not provide a higher quality signal than DVI (DVI already is a digital signal, capable of delivering resolutions of up to 1920 x 1,200 for single-link DVI and higher resolutions for dual-link DVI). From a technical sense, there isn't anything that can be done to improve DVI at the moment). DVI, on the other hand, does not convey the encrypted signal. It is the only thing that is permitted to come out of Blu-ray players.