Just Print Color and Kaleido are the exact same thing. If you hear anyone referring to color e-paper in 2020, it basically just refers to the new tech, which again is Kaleido or Print Color.

We have learned this technology now has an official name, Print-Color e-paper. Print-Color e-paper E Ink can produce color for each pixel that is displayed on the screen. This includes red ...

Don't expect Amazon to use this Print-Color display in a new Kindle any time soon, but we could see Print-Color eReaders in some form by mid-2020.