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Comment by esperent | Hacker News Reader

The big differentiator in these products is drawing latency. Currently there's only two with barely acceptable level IMO: Remarkable 2 and Supernote a5x/a6x, both around 30ms.

I can't find any numbers for the Kindle Scribe so I guess no one has tested yet. But I also bet if Amazon was proud of the number they'd be shouting about it - especially if it was better than the others.

So Remarkable and Supernote are probably fine for another generation at least.

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the iPad Pro gets to around 9ms perceived latency by using a very interesting trick. Essentially, it predicts the direction the pencil is moving and generates a short straight line in that direction. After the pencil has moved on, it corrects the line to follow the actual path the pencil took. I wonder if the e-ink companies could do that?

i remember reading that backlight on eink tablet compromises writing experience, which was why Supernote didn't add it. I can believe that as backlight probaly requires an extra layer between the writing surface and the sensing surface. Seeing that Amazon Scribe has backlight I imagine they prioritized e-reading vs e-writing, which is understandable because Kindle.

This is all pure speculation though.

I do have Supernote and the writing is as good as it gets for me paper-wise, my brain is fooled into thinking I am proofreading text printed on paper, which was all i wanted from that device.

Huawei MatePad Paper is under 30

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