Within the e-commerce niche, conversions matter the most - how you convert a window shopper into an actual buyer. This means removing all sorts of friction points. Turns out PWA is really good at page load and it works just fine.
There are several reasons why PWA is gaining more traction in ecommerce these days.
Some of their benefits include its numerous advantage offered for the end-users like no installation required for having the app on a smartphone. It enables to
1) Add the app to the home screen
2) Provides native app-like experience
3) Quick loading in the blink of an eye
4) Less data consumption
5) Offline functionality using service workers
6) Easy maintainable
Flipkart, a major e-commerce firm in India, increased its conversions by 70% just through their PWA approach: https://developers.google.com/web/showcase/2016/flipkart