I think I get the idea, but I was thinking it is for OmniFocus forecast option on MacOS like it is on iPhone.
If you will be able to get a screen shot I would appreciate. Maybe I'm getting it wrong, however I think it will have no use for me.
It's not an interactive list. It's simply a text list of items starting in the next x days (or due in the next x days). When you make a change in Omnifocus, the next time the script is refreshed, these changes will be reflected on your desktop.
So if you don't keep OF open on your mac all the time, but you'd like to be able to see your task list at a glance by looking at your desktop, these scripts might be worth you while. But if what you really want is something pretty close to the iPhone functionality, this probably isn't what you want.