Hi, This is a great feature, we've been keen for being able to save as look or dashboard tile since it was first available in the lab.
While the ability to filter on dashboard is the definitely where we'd like to see it move to next, I'd also be keen to be able to merge two sets of i_looker explores. Since the i_looker explores aren't visible in the explore pick list, this is unfortunately not yet possible.
A classic use-case of this, would be to merge i_user with i_sessions to get be able to see which users aren't using their access. Alternatively added a left_join session view to the i_user explore would also achieve this