I think the base premise of this comment is wrong? Apple has had many features like this available for a long time and it's hard to think of many things that ar

I think the base premise of this comment is wrong? Apple has had many features like this available for a long time and it's hard to think of many things that are more mainstream technology. You can input text, equations and what have you with the Apple Pencil, you can scan your handwritten notes to text in Notes, etc, it's all already there.