Question: are high speed hdmi cables necessary?
Answer: Standard-speed cables are rated to carry up to 1080i. Many standard-speed cables can probably handle 1080p, they're just not rated for it. High-speed cables can do well beyond 1080p (up to 4K, so you don't need "4K HDMI cables"), including 3D. ... Any high-speed cable should work with 3D and Audio Return Channel (ARC).