A:
That is a great question and very difficult to answer from a version perspective - but easy enough to address in full. HDMI 2.0 (aka HDMI UHD) was released to the consumer market on September 4, 2013. You state "Fall 2013" as the approximate purchase range/date so you are in one of two camps:
1.) You made the cut so to speak and are HDMI 2.0 capable.
2.) You are HDMI 1.4b capable and a bit further behind [introduced October 2011].
Either way, the short answer is that your cable is out dated since it can not handle HDR content as found in the April 2015 release of version 2.0a. Newer cables are already 2.2 so you'll need to purchase new interconnects to get everything out of that QLED monitor. And don't forget everything in the chain must be HDR content capable (or ATMOS, or Dolby Vision, etc.) if you want it to sound/display best. That means your Audio Video Receiver, UHD Blu-ray Player, the HDMI Cables all need to be compatible with the format your trying to achieve.
Hoping this helped.
I