Handbrake shows significant improvements in both 4K and 1080P video transcoding. Science Mark shows us something interesting, or at least the beginnings of something interesting. Intel has definitely boosted Skylake-X performance by implementing a mesh interconnect architecture and re-configuring cache, and while that's all great, it doesn't mean there won't be any performance pitfalls.

Engineering is about trade-offs, and that is what we see here. Skylake uArch is quite fast in single-threaded, and it shows in SuperPI.