The 10bit HEVC comes from Apple's T2 chip, not the Ice Lake. That will be not used. AVX-512 is also something rarely used. VRR is not very to Apple. If you're thinking these will have 144Mhz displays forget about it.
The GPGPU on these are crap and they won't be on the 10nm process, but the 14nm+++. Nothing about this as a product now or in the future is a smart move, not just for Apple but the entire industry. Intel is pigeonholed for the next 18-24 months with high yield failure rates on 10nm, never mind anything smaller.
Q3 Zen 3 arrives on 7nm+ for APUs, CPUs, Server CPUs, TR CPUs. By the time 10nm yields are fixed AMD will be using TSMC 5nm who are presently investing in over $25 billion in new 5nm Fabs to meet their growing demand and Intel's shrinking capacities.
The RAM is nice, and we can thank Micron for that.