I think you are setting up a bit of a straw man argument. The parent comment said "existing designs." While you apparently refuting their statement, you are saying something different by jumping to "existing products." Products and designs are not the same thing.
They are both designs lol, an ipod, iphone, toaster what ever is a design. It is then changed from a design into a physical product. It's the exact same thing as a UX design of a OS, you can turn it into a OS. It's just not fully done yet.
