Sure this would be nice in terms of bitcoin mass adoption or as a support to BTC in general.
But lets be realistic: to do business or especially a trade business like amazon does BTC at the moment is way too volatile.
If there are 20% swings in value compared to any fiat currency in one day it would be really hard for amazon to calculate their business.
Furthermore there are other problems that are not really solved at the moment, ie the number of transactions in a given timeframe or even legal issues.
So imo its a long way for bitcoin to get there.
I say its possible and also i believe in it but it will take some time.
No need to hype yet.