[joking]

You can calculate the value of each screen pixel without knowing the value of the others. To calculate the n value of a fibonnaci sequence you have to calculate the n-1 and n-2 values first, so it doesn't matter how many cores do you have. Gpus are for the former and CPUs for the latest.

[chillee]

Nitpick: I understand your point in general, but it's not actually true that you need to calculate the n-1 and n-2 values first for Fibonacci.

You can use Binet's formula or matrix exponentiation to calculate it without such a dependency.