A CPU die is made out of a disc of silicon. The closer to the center of this disc you get, the better the CPU made out of it will be.
For example, a Celeron is the outer edge, and an i7 is the near the middle.
The silicon lottery usually refers to overclocking limits. A better overclocking CPU is considered "winning the silicon lottery."
CPUs have variances in how they overclock. No two OC the same. Therefore, we coined a term for it.
This is the disc. And it looks fantastic. But, it is also immensely powerful.