floating due dates
This is useful feature if You can create tasks with due dates, linked to completion of other tasks.
for example you can create
> task A (with no due date)
> task B (with due date: 5 days after completion task A)
> task C (due date: first Monday after completion task B)
So You can create automated arrays of tasks. Avoiding all time manually due dates assignment.
Have to admit, I would use this feature quite often
This is already suggested in Chained Todos