In just a few weeks, Microsoft will unveil Cortana running on the desktop in Windows 10. They’ll demo how the personal assistant is available to you whenever you need her, on your phone in your pocket, out and about on your laptop or home at your desk. They’ll stress how she can sync all your data across all your devices, and be ready to help when you need her to be, much like a real personal assistant. And in the light of these announcements, it’ll become clear why internally, Microsoft is working on bringing Cortana to rival platforms, as well as the Xbox One.
It’s unlikely Microsoft will actually announce plans to bring Cortana to rival platforms at its January 21st event, and the fact that she's even being thought about on rival platforms isn't really surprising. It’s happening because of her arrival on Windows 10, and how Microsoft is setting her up to be the same assistant available to you everywhere. Set a reminder on the desktop and it’ll popup on your phone, or setup a meeting on your phone and have it popup on your desktop. It works both ways, and much like a personal assistant, is always available to you where most convenient.
As of right now, the only problem with the idea of Cortana being everywhere is that she’s only available on one smartphone platform, and that platform is the least popular out of the “big three”. The majority of Windows users are indeed iOS or Android users, and getting them to upgrade to Windows 10 will be a difficult task. By launching Cortana on rival platforms, it gives Windows users more of a reason to upgrade, as what some would call Windows 10’s best feature also has a companion app available for their smartphone, even if their smartphone isn’t Windows-based.