As part of the new wave of innovations rolling out in OneDrive for Business, we are going to have the option to open non-office files with the native application (if available). In this way, we will be able to open PDF, image and video files with their respective native apps. More details about the Open in app feature can be found in the the following blog post published in the OneDrive blog:
Of course, this feature is going to be available also in Teams and SharePoint: