Well said, Philly_Boy.

I keep hearing people referring to Skulltrail as a "proof of concept" board. That term has specific meanings, depending on whether you're talking about computer security or business. This is how it is defined in Wikipedia:

Proof of concept is a short and/or incomplete realization (or synopsis) of a certain method or idea(s) to demonstrate its feasibility, or a demonstration in principle, whose purpose is to verify that some concept or theory is probably capable of exploitation in a useful manner. A related (somehow synonym) term is "proof of principle".

The proof of concept is usually considered a milestone on the way of (sic) a fully functioning prototype.
Skulltrail is neither a proof of concept or a prototype. It's a finished product that will soon be available for sale.