Hi,
this feature is very useful for my kind of processing tasks. Also, it is unique, compared to other solutions.
I process my tasks according to FVP (a workflow invented by Mark Forster http://markforster.squarespace.com/). More on this on http://markforster.squarespace.com/blog/2015/5/21/the-final-version-perfected-fvp.html.
This very simple processing involves left- and right brain - if there is one 
In this workflow a task which is done, but NOT completed, will be “rewritten” at the end of the list.
This can be simply done by duplicating (CTRL+D) and moving the task to the end of the list(CTRL+END). Then, jump back (g+left) and mark the (origin) task as done (not hidden, so you can witness your progress). Now, with this shortcut, you are back where you left off immediately, complete the task and continue processing your tasklist.
Thus, this feature is very, very helpful… and makes checkvist better than paper for which Mark Forster systems are intentionally designed. Checkvist also works with every system by Mark Forster e.g. Autofocus or DoItTomorrow…
Thanks KIR!