Windows 10 Mobile does have such a feature, though
Windows 10 adopters have mixed feelings about the new Start menu, and while some people love the new approach with live tiles (borrowed from the Windows 8 Start screen), others hate it and would rather get a simpler layout like in Windows 7.
But if Microsoft’s listening to the first category of users, the company should discover that, right now, the Start menu is lacking one very important feature: the possibility of setting live tile transparency level.
Live tiles in the Start menu have the very same purpose as in Windows 8.1 and provide a decent amount of information without the need to open the apps. And while Microsoft has introduced a number of tweaks to the Start menu, including the transparency and blur effect that’s being used on the taskbar as well, live tiles retain almost the same design as in Windows 8.1.