Board Thread:General Discussion/@comment-4996890-20130522204429/@comment-452-20130522213759

In theory, a custom javascript extension could be written which would load your Watchlist and add unread items to the notification area. It wouldn't be that much different than the AjaxRC extension, and would definitely be more handy since you'd get the notification of an edit no matter which page you were on.

I'm not aware of that currently existing, but you asked if it was possible.