I agree with you, it would be a revolution in online sales when (not if) Amazon starts accepting crypto. But the recent statement of one of its executives makes it clear that they are in no rush to implement this.
Yeah this will indirectly influence many other online commerce services to follow in the same path of accepting bitcoin as a payment option. Plus since Amazon doesn't accept PayPal ,another prospective payment method will be an added advantage for bitcoin.
Well it is all speculation at this stage and we'd have to wait for while to see how things will unfold but it speaks well for bitcoin if amazon will adopt it as one of their payment processors because there are a lot of people who want to access amazon remotely but bare denied due to their credit card or jurisdiction and bitcoin can bridge all that discrimination.