Costco to No Longer Accept AMEX, Only Visa

Costco currently only accepts American Express cards.
Soon, Costco will accept Visa cards.
Starting April 1, 2016 (in 13 months), Costco will no longer accept American Express.

This is primarily of interest to me because many people who fill out my Free Credit Card Consultation Form let me know that they need an AMEX because they do a lot of their shopping at Costco.