No, not yet another useless API. W3C is killing itself by allowing the extension of the web standard in a manner "Extend It Until It's Dead"
Microsoft should've not been allowed to join the W3C.
Microsoft should've not been allowed to join the W3C.
It's a community group document, so not a standard and not on the way to become one.
Second, W3C function as a standard promoter is compromised when it allows its members to make use of draft/private proposals as ersatz standards.