Its not new. Its called a covey chart and is used in "The 7 Habits of Highly Effective People" from 1989, a highly popular self help book. (not sure if it was used in any prior work)

I know it as Eisenhower Method, which is even older: https://en.wikipedia.org/wiki/Time_management#The_Eisenhower...

It's new in a sense of 'something that is not yet another rigid list of tasks'

It's Eisenhower Matrix through and through, but I found draggable task dot quite refreshing.

Thanks! Yep, lists aren't great, unless they all fall in the same domain (like grocery shopping, travel packing, etc.). Bring in context change and they tend to become less useful, really quickly.

As others have pointed out, this is nothing new. I am just presenting an easy to use app+viz

I’m not sure what you mean by context change. Is that where you have two (or more) items that are of different sorts (from different contexts or domains), where this difference between them makes it difficult to compare them and thus rank them in a list?

Yes, essentially. A list is one-dimensional, so you can only rank a task by it's order. There are actually multiple dimensions that our brain considers when making decisions, but I only chose these 2. There could be more (as others have pointed out), but that makes the planning annoying and visualization cluttered.