This sounds like what Microsoft has tried but failed to do in numerous iterations for two decades: OFS (Cairo, unreleased predecessor to Windows 95), Storage+ (SQL Server 7.0), RFS (SQL Server 2000), Exchange Webstore, Outlook LIS, WinFS, and finally Microsoft Semantic Engine.
All projects were either cancelled, features cut, or officially left in limbo.
It's a pretty remarkable piece of Microsoft history as it has been there on the sidelines since roughly post-Windows 3.11. The reason they returned to it so often was in part because Bill Gates loved the idea of a more high level object storage that, like this, bridges the gap between files and databases.
He would probably have loved this kind of technology part of Windows -- and indeed in 2013, he cited the failure of WinFS as his greatest disappointment at Microsoft, that it was ahead its time and that it would re-emerge.