One benefit of doing this job is you tend to have a bird's eye view of the mobile landscape. Specifically I mean you tend to know the history of every bit of software and hardware, unlike the casual consumer.
Case in point is WhatsApp and voice calling. New articles are making their way around the internet noting WhatsApp's voice calling feature as coming to Windows Phone "soon" and "in the works".
There is no doubt that this is the case. After all, WhatsApp did announce that Windows Phone would get the feature. The thing is they announced it back in February, 2014.
Full story from the WindowsCentral blog...
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