It's not exactly a secret that Microsoft's Surface Pro 3 has been selling well; the brand hit a billion dollars for the first time last year. With the Surface 3 now on sale, all eyes are turning towards the Surface Pro 4.
When you think about when the Pro 4 will be released, you need to look at Microsoft's other products for guidance; specifically Windows 10. If Microsoft is going to launch the Pro 4, it would seem reasonable to conclude that the device will ship with the company's latest OS and be the 'hero' device for the new software.
If we take this approach and other information that has been announced by Microsoft, we can paint a better picture than what is currently known about its release window.