There are projectors with DisplayPort, but HDMI and VGA are more common. Laptops usually use the USB-C DP alt mode to output DisplayPort signals. HDMI requires a separate port. USB-C can output HDMI, but very few devices support it and it will never be updated past HDMI 1.4.
There are projectors with DisplayPort, but HDMI and VGA are more common. Laptops usually use the USB-C DP alt mode to output DisplayPort signals. HDMI requires a separate port. USB-C can output HDMI, but very few devices support it and it will never be updated past HDMI 1.4.