My television set is HD, but very old. It only has one HDMI port! Nowadays, there are lots of devices wanting to plug in to your TV. I have a ROKU stick that I won in a contest that I have never been able to use because I didn't want to deal with unhooking the Blu-Ray player.
Well today, I ordered an HDMI port. It plugs into the TV, splitting the one port into 5. Should be mighty convenient.