Yes, Pantone describes inks using samples of actual products because it is in the business of selling ink.

Familiarity is the big design advantage of Pantone color. I look at the samples, pick a color, and that’s what I will get. Whether or not my monitor is calibrated or whether or not I am using a computer at all.

From a business perspective, if you’re logo is Reflex Blue, then any reputable print shop can print your leave-behinds and any decent sign shop can make your tradeshow display.