A Pocket CRM in Lumia...
One cool feature in W10 Mobile is the Timeline associated with contacts. You can see the history of interaction in a glance, calls, e-mails, meetings/calendar entries, SMS and WhatsApp messages etc. Hopefully Microsoft will integrate this data (if enabled for each particular contact) with the company CRM.
With that, we'd finally have a CRM that doesn't require extra updating effort.
P.S. One of these years, the business phone could display also the company name for incoming calls...