I think the author is confused, concluding because Google own a fibre network operator (who is exploring wireless local loop connections) that Google are also actively seeking to become a global MVNO - whilst they might be the author presents no evidence to support his viewpoint.
I think the author only introduces Google so that the piece doesn't come across as being anti-Apple, because as you point out the only major player actively wanting to get rid of the physical SIM is Apple, which is a stance that totally contracts the author's statement "Apple just wants to sell you more stuff.".
Biting the hand that feeds IT
