You'll start hearing about the new or next big version of Windows -- judging from what's been published so far, unless you're looking for a Chromebook alternative, it's likely nothing to get excited about.
The advantage of Android, from a casual user perspective, is that you just use it. Updates to the OS itself are rare -- not that updates aren't released frequently, but most people never see them because they have to come through the manufacturer, then usually through the cellular carrier, and neither wants to bother with stuff that costs them money yet yields no added profits. One thing Android does have right, is that apps are easily added & removed in their entirety [assuming they're not malware, which can take a reset to remove].
With Google trying to bring Android apps to their Chromebook laptops, and Apple starting development along the same lines, Microsoft more than ever feels that it needs to compete in the Android & iOS space. The first step, forgetting for a moment the Windows Phone/Mobile & win8 debacles, was Windows 10 S -- a version of Windows 10 Pro that can only run apps from their store... no traditional [win32] software allowed. It's the closest you can get with Windows nowadays to the just run & forget it nature of Chromebooks.
In parallel development Microsoft has gotten Windows 10 to run on one model [so far] Qualcomm CPU. What they're working on is a lighter weight version of Windows 10 that's built entirely using their UWP [Universal Windows Platform]. UWP is designed for apps in their store, which are *intended to be* more sandboxed when run, featuring complete removal when uninstalled.
This new version of 10 will have a single Windows core, and the shell that's used will vary according to the device, e.g. tablet, laptop etc. All legacy code -- I think they found files in win10 going all the way back to win95 -- will be removed, along with the capability to run traditional Windows software. That said, Microsoft will probably include some way that corp IT can continue to use mission critical win32 software. At least for now, plans call for it to ship Only preinstalled on hardware -- you won't be able to buy it separately -- and development to proceed alongside the regular versions of win10 we run now.
Microsoft is pushing a new subscription plan bundling Windows & Office, and this new version of Windows is *probably* intended to replace win10 S that comes with that package now. Its goal is to make managing a bunch of Windows devices easier, and to make Microsoft money of course. How successful it is will likely determine what happens with good ol' regular Windows in the years to come.
A hint of their thinking at Microsoft's higher levels is seen in their moves with PowerShell. PowerShell was intended for network & system admins to better manage their Windows servers & PCs. The cloud however uses a mix of Windows & Linux servers, & the cloud is where Microsoft's biz & profits are growing. Microsoft has stopped development on the Windows version of PowerShell, with all resources now focused on developing PowerShell Core, an open source version that runs on .NET core [also open source] on Windows, Linux etc. Missing from PowerShell Core are many [maybe most] of the tools that are used for Windows in the Windows version.
Along with Microsoft's efforts developing software for, and making sure Office runs on iOS & Android, they're becoming less & less Windows-centric. IMHO it'll be interesting to see what they do with the Xbox in the future... Sony won't let them near the Playstation or its on-line parts, so there's no crossing over like with Android. If Windows on the Xbox starts to diverge more from the desktop, &/or Microsoft starts backing away from developing games, Microsoft might start backing away from Windows desktop development too. A maintenance only model would suit a lot of biz & organizations just fine.