Currently you have to be a database administrator to access _active_tasks. For UX purposes I would like to allow anyone to see view generation statuses, preferably on a per database level. This solves the problem of the first user to generate a view that then receives no time estimate as to when their process will be completed. I can't think of an application use case for making replication data public.
I spoke with Volker Mische about the implementation details on this issue and he asserted after a code dive that it appears achievable, though the innards of the view status code were not familiar to him.