Subscribe to views results?

It is as huge feature as the Message module(-s) itself. Proposed features:

1. User filters a view. For the simplicity lets say it is a nodes view where only subset of all nodes is selected
2. Then he creates (manageable in the same way as all the other subscriptions) a subscription where he can receive email when only new/updated/other-conditioned nodes are added AND they are in the selected views filter subset

Basically it is subscription to taxonomy terms, search strings, date and other conditions at once.
There are https://drupal.org/project/views_savedsearches and https://drupal.org/project/views_save modules, but they are not too much into Message ecosystem and offers not much needed features themselves