CSP 1.1 and image loading elements/attributes

A few months ago there was a discussion on this list regarding the current
definition of image sources [1] and the fact that it includes an explicit
(and partial) list of element that may load images.
The conclusion was that finding a generic way to say "elements that load
images" would be better [2].

The introduction of the srcset attribute in WebKit amplifies the need for
such generic phrasing.

What is the status of this change? Is it waiting
onhttp://fetch.spec.whatwg.org/to include resource types?

Yoav

[1]
https://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html#dfn-allowed-image-sources
[2] http://lists.w3.org/Archives/Public/public-webappsec/2013Apr/0068.html