Everyone (should) appreciate HDR! It's the first improvement in display technology since moving to 1920x1080. 4K is quite useful for workstations too of course.
3D came and went and we all laughed. Curved screens came and went and we all laughed (I think they're being marketed to workstations and gaming now). 360 has potential, but it's not being pushed as hard as things like 3D were - avoiding the same mistakes. I suspect that 360/vr will be the next major change, for things like sport and maybe news in any case. 360 for dramas requires a lot of editorial thought, but for sport, nature documentaries, etc, it could well stick.