This is scientifically significant.

It demonstrates that the combination of traits associated with “European” appearance in the modern world is not ten thousand years old — it is at most five to eight thousand years old, and some elements of it are more recent than that.

The characteristic light skin of northern Europeans is not ancient; it is derived.

More broadly, the Cheddar Man finding is part of a larger pattern that ancient DNA research has established: the genetic characteristics of any modern population are the product of multiple migrations, population turnovers, and admixture events that occurred over thousands of years.

There is no population anywhere in the world whose ancestry is simply continuous from some early state; all populations are the products of movement, mixing, and transformation.