Yes, HDMI 2.0 is enough for Dolby Vision. Dolby Vision, along with HDR10, is available in 4K video only. To support Dolby Vision, you need a high-speed HDMI cable that can handle 4K data throughput. HDMI 2.0 is typically capable of this, so if you purchase an HDMI cable suitable for 4K, it will work with Dolby Vision as well.