Some (many?) HDMI cables can also carry Ethernet over HDMI. The main use seems to be to provide internet connection to a smart TV from a cable modem box. Currently I have an ethernet-USB adaptor ...

If you’re using a laptop] on a daily basis, you’ll know how tiring it can get to stare at a 13-inch screen for hours on end. This is why it’s great that most modern computers can be connected to a TV.

Most HDMI cables you'll use in a home theater or computer setup will just transfer audio and video, but there are ones that ...