An interesting review of Windows 10 Cortana. There have been Windows apps going back to Windows 95 for voice input. Although I trained it I never really used it much. That was just for dictation though. Now with Cortana as a virtual assistant, and everyone used to Siri and Google Now, will everyone be talking to their PCs?
http://reviews.gizmodo.com/i-installed-windows-10-and-now-im-talking-to-my-compute-1719786498 [reviews.gizmodo.com]
I Installed Windows 10 and Now I'm Talking to My Computer
Cortana on Windows 10 works a little bit like Siri or Google Now, though all three have their differences: You can use your voice or the keyboard to ask questions (“what’s the weather like in Sydney?”), set reminders, launch apps and even toggle Windows settings.