Giving unified user experience
Michael Fauscette makes an excellent point about creating a unified customer experience:

Can you spell "data fragmentation"?
Commerce has resurfaced as a focus (or what was called eCommerce) for many businesses as we start to create customer experiences that blur online and offline in a converged commerce experience through the use of mobile, Internet of things, Near Field Communications, social and hyper-connectivity (including ubiquitous connection to social networks).
True that. Now consider this. If at any given moment you use 10 different apps (a few email accounts and social networks, CRM, shopping cart, chat, IM, shared calendar, email marketing service — finish the list for me) you end up having your data and conversations fragmented across 10 browser windows, at least. Can you call your own user experience unified? Hardly. Then neither can your customers call theirs.
You can not give what you do not have.

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