The advancement isn't in the attachment to the eye, but rather the machinerie of the device. The one that you're thinking of would have had a resolution of 4x4, meaning 16 pixels which where either black or white. If I understand corectly, this device has 60 pixels (about 7x7, it can't be square though) and produces some sort of grey scale (ether 16 or 256 both of wich beat 2). The thing is that they both interface into the optic nerve in the same way.
To err is human, to moo bovine.