[dom] Is the NodeList interface being deprecated?

The latest /TR/2015/WD-dom-20150428/ spec mentions that the new Elements
interface is “the new NodeList”. Could you elaborate on that? Is it meant
as a **complete** replacement (effectively making NodeList legacy)?

I’m interested in the scenario of proposing new standard APIs which would
make performing operations on a set of DOM elements easier (think jQuery),
and creating a prollyfill to enable such functionality in today’s browsers.
Should such work be performed on Elements.prototype instead of
NodeList.prototype?