[citation][nom]shoelessinsight[/nom]The DisplayPort specification offers more bandwidth than current implementations of DVI or HDMI, which potentially translates to higher resolutions, greater color depth, and/or higher refresh rates.HDMI and DisplayPort support audio and video on the same cable, whereas DVI only supports video. Unlike HDMI, however, DisplayPort is royalty free.Finally, DisplayPort has the ability to transport multiple audio/video streams over the same cable, which means multiple monitors can theoretically be driven by a single port.[/citation]
You can also pass usb over the DisplayPort. That way only one cable needs to be connected between pc and monitor for video, audio, and usb.