Messages

Built-in Advanced Stock Management is one of the most important factor people go for Magento or Prestashop ( doc.prestashop.com/display/PS16/Presenting+the+Stock+Management+Interface )
People want to see this feature in core functionality.Third party extensions might seem a solution but compatibility after upgrade, poorly developed codes are common issues!

Built in POS would a killer feature and DEFINITELY attract many people!!
Cause most of retail store stores have online store as well but they have a hard time to manage inventory and sales ,and always looking for integrated solutions.This is the SECRET behind the Shopify's Success!