"Because the base layer is protected the abrasive" - I'm kind of struggling to understand this sentence. Lets assume it was meant to be "Because the base layer is protected by the abrasive" then it isn't really talking about the abrasive at all. It's talking about the base layer. I'd expect the base layer to retain its shape, it's the profile of the abrasive after 200 passes that I would be interested in.
But on the other hand lets assume somehow the sentence is about the abrasive and it's profile is always "PERFECT". As an engineer who has spent a lot of years working with abrasives I find this particularly hard to swallow. You have a product that by the very nature of its work wears away every time it is used. Let alone the fact that the entire surface of the profile of the grinding wheel is not in contact with the skate blade (the outer edges do not contact, do these just mysteriously evaporate away?) you have minute variations in the shape of the hollow of the blade that causes + / - grind resistance as the wheel does it work. And if you ever changed your hollow then this would only magnify the issue.
Otherwise what they are saying is they have invented an abrasive that never changes shape during it's life span, its wear is even and consistent REGARDLESS of the shape of the surface it is in contact with. If this is the case then they are wasting their time making skate sharpeners, I can think of a dozen better applications they could put this technology to use with...