Show in X days
For task sheduled in the future add field: remind in days:
And start show it task in Today page in X days before sheduled date.
For example I want have a week for prepare gift and I want have 2 days for buy a ticket.
Good idea. I think this could be easily achieved with relative due-dates for subtasks (see https://todoist.com/Vote/showProposal/1014/)