Ya I think spas you have it right. I was reading from http://www.digitalconnection.com/faq/HDTV_12.asp where it mentions the schemes. It also reflects that of course DVI is older than HDMI, but I was under the impression that DVI provided better graphics. But that was just words from a buddy. Well I guess I'll just test it out and see...making sure my new monitor has both DVI and HDMI connections.
The first difference is that HDMI technology incorporates content security that is called High Definition Content Protection, also known as HDCP. The other huge difference between Digital Video Interface and High Definition Multimedia Interface is that DVI can only support digital video, and HDMI can support audio and video on the same cable.
This leads to another big difference between HDMI and DVI. The number of cables that need to be used and run during installation. With Digital Video Interface at least two cables are needed. One cable is needed to support the video signal, and one cable or cord is needed to support the audio signal, because DVI can only support video, not audio. With HDMI only one cable is needed for the installation. This is because the HDMI can support all formats of digital video plus it can support multiple channels of audio signal as well.
Sound+video with one cable, just as you said and a connection that is easier to connect(more easy to blind connect HDMI).
I have HDMI @ my computer but DVI on the other end of the cable for me screen(smaller plug fits better in this case.).
That said, I have yet to see any difference from one to the other(my screen seems to use a brighter profile(blue/green) with HDMI, but that is on the screen end, most likely to make movies more vivid).