A new version of the HDMI cable, the HDMI 2:1, was recently released which features a new high-bandwidth cables called "48G.
Does this mean you need to get new cables? Probably not.
According to CNET, the new HDMI 2:1 cable is really only necessary if you're working in high resolution (think 4K).
Plus, the new HDMIs are very expensive right now, costing as much as $50.
Unless your HDMI is already dying, just wait it out until the cost goes down.