Having the ability to work from your mobile device gives you the power to collaborate 24/7, from wherever whenever you want.
The new mobile and browser views in Office 365, which will roll out to SharePoint 2016. Source: https://blogs.office.com/2016/05/04/the-future-of-sharepoint/
Microsoft also introduced a Responsive User Interface Package for SharePoint on premises, designed to adapt SharePoint views to your screen size so you can work on any device. Microsoft Senior Program Manager Vesa Juvonen illustrates the different views in his blog post and video on Channel 9.
The previous mobile experience wasn’t the greatest, since Microsoft offered no dedicated app or responsive design. However, during the live announcement of SharePoint 2016, Microsoft really blew me away with the look and feel of the mobile app – it’s modern, clean, and fresh. They are really focusing on the user experience and moving toward a cool, new feel that will ultimately help users be more productive from an easily accessible mobile platform.