On the customer-relationship management end, there were several unique needs, as well. For one, Warby Parker hopes to be able to track and compile all of the company’s interactions with a given customer in one spot, whether it be email communications; items viewed by the shopper on the website; or billing, shipping and payment information pulled from any purchases that customer has previously completed online. The vision is that retail workers will be able to view the full history of the relationship with the customer right from a tablet in-store.
via Warby Parker Is Building a Point-of-Sale System – Jason Del Rey – Commerce – AllThingsD
stevebanfield.blog 
I’m not sure that’s really unique to Warby… This is the holy grail of customer management that every retailer is chasing – achieving one consistent view of each customer across all their touchpoints…
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