Joshua, I saw your question and thought I would answer since Amazon doesn't typically respond to discussion board posts.
HDMI cables are used to connect compatible components such as television and dvd player. HDMI cables will provide digital audio and up to 1080p throughput if they are "High Speed" rated. If you have a 1080p television and a Blu-Ray player, you should be using an HDMI cable to connect them, yes. Be prepared to be amazed. 1080p pictures are breathtaking if you haven't seen them before.