As mobile web traffic (and mCommerce) continues to increase the use of Apple Pay will almost certainly improve mobile conversion rates. Until other ecommerce providers offer Apple Pay this is definitely an A+ for Shopify!
How Apple Pay on Shopify Works:
Typing address and credit card details will soon be a thing of the past. Shoppers will be able to buy from Shopify powered ecommerce websites using just an iPhone or iPad and fingerprint.
Using Apple Pay, customers will be able to quickly and securely check out online using Safari (macOS Sierra and iOS 10) on the iPhone, iPad, and Mac by tapping the enabled Apple Pay button and scanning their fingerprint.
The Apple Pay payment method is provided to Shopify merchants at no cost. Apple Pay can be enabled if using any of these other payment gateways: Shopify Payments, Stripe, Paypal by Braintree, FirstData Payeezy, Authorize.Net or CyberSource.