[apabepa]

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)

[bildung]

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

[raindropm]

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.