The image is by Alex Castro.
There is a rumour that a feature is being worked on that will allow you to migrate your chat history from one platform to another.
The feature was first spotted in the latest version of the app for the mobile platform. There is a feature that may let you transfer your chats from your phone to your device.
:noupscale(cdn.vox-cdn.com/uploads/chorusasset/file/23187939/wachathistoryandroidtoios.png)
The feature may look like a couple of pictures. According to the images, it appears that you will be told to keep the app open and your phone unlocked as the transfer process begins.
The feature to allow users to transfer their chat histories from the iPad to the phone was first introduced in September. It remains unclear which devices will support the rumored feature, as well as when (or if) it will start rolling out.