You will need to wait another 6 months for the HZ. The differences between the GZ & the HZ is Filmmaker Mode, Dolby Vision IQ, Dolby Vision Calibration, More Detailed ISF Calibration Tools, eARC. And they'll no doubt claim this Panel goes Brighter for HDR Specular Highlights.I really want to agree with that. Up until CES this year I had my mind set on the GZ950... then the HZ was announced and now I don't know what to do! Wait for the HZ to retail and get the GZ discounted or go straight for the HZ.
As I mentioned, I will expect similar longevity as my current one so the constant, annual refresh is putting me off pulling the trigger, and now I'm wondering if it's actually better "cheaping" out and refreshing every couple of years instead!