"With the addition of desktop apps, WhatsApp is now available pretty much everywhere: On all major smartphone operating systems (Android, iOS and Windows Phone), through web browsers and now on the most popular desktop operating systems. The desktop software will allow users to message friends sending images, video and audio files, but initially at least, it won't allow for voice calls to be made.WhatsApp Desktop Apps For Mac And Windows Launched To Take On Skype
The only other app with such ubiquity is Skype and with video-calling still not available on WhatsApp, it retains a key appeal for users. However, code within a beta version of its iOS app indicated that video calling is being developed and if this is rolled out to all platforms, it could have a significant impact on Skype's business."
Wednesday, May 11, 2016
WhatsApp Desktop Apps For Mac And Windows Launched To Take On Skype (International Business Times)
Also see WhatsApp launches native desktop app for Windows and Mac (VentureBeat)