In most cases, your existing HDMI high-speed cables should be able to support Blu-ray 3D™, though cables over 3 feet in length may have problems. The main difference between HDMI 1.3 and HDMI 1.4 is that version 1.4 includes the addition of Ethernet support between two HDMI-connected devices. This addition is not needed for the proper playback of Blu-ray 3D™.