It may work for passing along standard high-def content (720p, 1080i & 1080p), but does not have the required bandwidth for passing along 4K content.
Keep in mind right now that the folks with 4K HDTVs are mostly viewing non-4K content.
There are four basic types of HDMI cables:
High-speed (also called Category 2)
High-speed (also called Category 2) with Ethernet
Standard-speed (Category 1)
Standard-speed (Category 1) with Ethernet
Can a standard Category 1 HDMI cable be used on a 4K TV?

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