I played with one yesterday. There was noticeable latency when writing. This means it won't replace paper for me. I carry a $10 "lcd writing tablet" in my bac

I played with one yesterday. There was noticeable latency when writing. This means it won't replace paper for me. I carry a $10 "lcd writing tablet" in my backpack, it's like a small whiteboard with an erase button and really nice typography, and it there are no electronics involved in the painting process (only in erasing). I love it, though it only replaces a whiteboard, not a notebook.