Look at 1:19 of the first video: http://www.youtube.com/watch?v=Kpi6aTv5o68. Is it as accurate as one might need it for drawing? I would prefer it over my wacom, because I like to see the line right at my pencil...
Yes, it looks accurate enough, but you would be missing pressure sensitivity when drawing on a surface (such as a pad of paper). But, even so ...
