With the world rapidly going almost mobile only, the ability to get access to your data all the time, from anywhere is now a core requirement for all organizations. If you have moved to Office 365 then that story becomes much easier as SharePoint is mobile ready, can be accessed on the device natively or by using the mobile app. If you want to take line of business data with you such as reports, then PowerBI comes into play with the mobile app to create a rich mobile experience.