All the functionality of this portlet and much more is provided by the Asset Publisher portlet. Having two portlets with the same functionality is confusing for the user so Web Content List will be deprecated in 6.2 and most probably removed in 7.0.
During the deprecation period the code will still be part of the product but it will be disabled it by default. This will make it possible for portals that are using it to enable them (from the Control Panel > Plugins Configuraiton) to keep using it. They would be able to migrate to Asset Publisher either slowly (manually) or all at once by installing a plugin that we could develop and distribute through the marketplace later on.