Microsoft's response to the Amazon Echo and Google Home is Home Hub, a software update for Windows 10's Cortana personal assistant that turns any Windows PC into a smart speaker
of sorts. Mashable reports: Microsoft's smart digital assistant Cortana can already answer your queries, even if the PC's screen is locked. The Home Hub is tied to Cortana and takes this a few steps further. It would add a special app with features such as calendar appointments, sticky notes and shopping lists. A Home Hub-enabled PC might have a Welcome Screen, a full-screen app that displays all these, like a virtual fridge door. Multiple users (i.e. family members) could use the Home Hub, either by authenticating through Windows Hello or by working in a family-shared account. Cortana would get more powerful on Home Hub; it could, for example, control smart home devices, such as lights and locks. And even though all of this will work on any Windows 10 device -- potentially making the PC the center of your smart home experience -- third-party manufacturers will be able to build devices that work with Home Hub.
You can read Windows Central's massive report here
. Do note that Home Hub is not official and individual features could change over time. The update is slated for 2017.