WhatsApp is preparing an update that allows you to access your account from various devices. In fact, you could access up to 4 different devices.
Until now, you can only access your WhatsApp account from a single mobile device, in addition to the web version. According to the WABetainfo site, the Facebook application is developing this feature and plans to launch it in 2020.
In addition, the site indicates other updates to come. The first will allow you to perform advanced searches by filtering the results by date and the second will allow you to search the web for images from the application itself.