These are neat, I’ve been seeing them around the web for a week or so now. That said, I’ve actually come around in the other direction. I was big on paper for lots of things, but have recently begun using my phone more for things like notes and todos.
The main reasons are searchability and archivability. My todos are always there, I can modify them, and they reach out to yell at me at the appropriate times. My notes done get lost in my desk anymore and take up no space.
I still like paper for fast writing and then I just port that over to my digital notes later.
I’m sure these are great for limiting distractability, but I’ve found that switching to an iPhone and not having my notifications in the top bar of my phone, along with having some type of focus enabled most of the day helps me not get distracted while taking care of something separate.