Will the UHD Premium certificate be added to this device, or do I run the risk of the interface to future third-party devices running without forced HDR when I buy it?
Only the newer ZD models will support HDR via HDMI. The ZA models cannot do this, not even with firmware. Those who want to use the EG960V models with external UHD devices must insist on a ZD model. Whether ZD or ZA, this can be seen on the packaging.