Microsoft is releasing an update to the machines on release preview ring for the Store, that renames it to Microsoft store and brings a new Icon in the taskbar and Start. Though there are no new changes inside, the update just brings the name update and Icon change. This is currently limited to Insiders specifically release preview ring which would be first getting the fall Creators update soon.
|Thanks to WinCentral and @Christoph_fer|
It is worth noting that the online version of the Store is also called Microsoft store that lets you install apps on your device if it is connected to your MS account.
There is nothing about it Microsoft has said, and we hope soon they will say it soon.
Credits: Windows Central