https://arstechnica.com/information-technology/2019/04/amazon-primes-default-delivery-window-will-soon-shrink-to-one-day/

Amazon's latest earnings conference call included the reveal of a major shift for the paid Amazon Prime subscription service: an "evolution" to one-day shipping as a nationwide default.

"We're currently working on evolving our Prime free two-day shipping program to be a free one-day shipping program," Amazon CFO Brian Olsavsky said in the company's quarterly investor relations call. The news came as a response to questions about both incremental-spending and revenue-acceleration predictions in certain portions of the company's Q2 financial guidance, which Olsavsky said revolved significantly around this push for faster default Amazon Prime shipping speeds.