The main problem in using Windows Mixed Reality headsets is the lack of proper input mechanism. So far, Microsoft has been demoing them by connecting Xbox controllers as the input device.
To solve this input problem, Microsoft is today announcing Windows Mixed Reality motion controllers. These new motion controllers will offer precise and responsive tracking of movement in your field of view using the sensors in your headset. Microsoft also highlighted that there is no need to install hardware on the walls around to make these controllers work.
Similar to the Windows Mixed Reality headsets, Microsoft will define basic spec to create a motion controller for Windows Mixed Reality headsets and then OEMs can build on it. Microsoft has created the controllers as a high quality and comfortable input device with the same ease of set up and portability as the headsets.
PC OEMs are planning to sell these controllers on retail shelves this holiday. Acer is today announcing that they will ship their Mixed Reality Headset with the new motion controllers as a bundle for $399 this Summer.