1: The monitor with HDMI does not require a computer to also have HDMI, as the monitor usually provides a VGA interface at the same time.
2: Generally, there are very few desktop computers with HDMI interfaces nowadays. There are more laptops with HDMI interfaces than desktop computers, and there are more home laptops with HDMI interfaces than commercial laptops.
3: The HDMI of the LCD display can be used to connect to the HDMI interface of a desktop computer or laptop for high-definition display.
In addition, there is a trend for the displayport (DP) interface to replace the HDMI interface. This is free of patent fees, and manufacturers prefer it.