https://www.theverge.com/2019/1/16/18185490/microsoft-cortana-windows-10-search-changes

Microsoft is making some big changes to Cortana in Windows 10. The software giant is planning to decouple search and Cortana in the Windows 10 taskbar, allowing voice queries to be handled separately to typing in a search box to find documents and files. This change will be implemented in the next major Windows 10 update, currently scheduled for April. Windows 10 will direct you towards an built-in search experience for text queries, while Cortana will exist for voice queries instead of them both bundled together.

“This will enable each experience to innovate independently to best serve their target audiences and use cases,” explains Dona Sarkar, Microsoft’s Windows Insider chief. “This change is one of several we’ve made throughout this release to improve your experience in this space, including updating the search landing page design, enhancing your search results, and integrating Microsoft To-Do with Cortana.”