In essence, yes. Native 4K@120Hz is only possible with the HDMI 2.1 standard. Therefore you need to look for an Ultra High-Speed HDMI cable rated for that resolution and refresh rate. At Ooberpad we have both copper and fibre optic-based cables. The latter provides improved signal quality over large distances and is much lighter in weight. However, they are also more expensive and should only be used for setups where the distance between the transmitting and receiving devices is > 25 feet.