Short-term experience: Digital sound and digital images are transmitted without loss in my opinion. So far I have my AV receiver / projector combo via Nvidia GeforceGTX460 HDMI HDMI fed with a high-quality cable. Now runs all over the DisplayPort-HDMI (Eig. Thunderbolt) my iMac, thanks to this Plug & Play cable, and I can not detect any loss of quality. Let's see what the future holds and whether the cable maintains the quality.