Is D Sub better than HDMI?
Correspondingly, what is D sub on a monitor?
D-sub connectors. (D-SUBminiature connectors) A family of plugs and sockets widely used in communications and on earlier PCs. For example, the analog VGA monitor interface uses a D-sub 15-pin plug and socket. The D-sub designation defines the physical structure of the connector, not the purpose of each line.
Moreover, should I use DisplayPort or HDMI for gaming?
HDMI and DisplayPort are different connections that both support 4K resolutions. HDMI is the best choice if you are just connecting a gaming console, blu-ray player or streaming device to your TV. However, you'll need multiple high end graphics cards to play games at this high resolution and frame rate.
Short answer: USB type C cables are quite likely to replace HDMI cables, but HDMI will live on within the USB type C cables. So no, USB type C won't replace HDMI, it will just provide HDMI connectivity in a different physical form. HDMI is both a physical connector and a communication language, dedicated to video.