Current HDMI cables already support 2.0 standard. The specification clearly details that no new connectors or cables are needed - only actual hardware support needed for a Display and Video Card.
Therefore there are no 2.0 HDMI cables, since standard HDMI cable already supports 2.0 anyway.
Also, all the video cards in existence now do not support HDMI 2.0, so it's a moot point anyway. Maybe GTX880 will finally support it.