Sort of off-topic, but an interesting angle on handwriting recignition--
The Sony DPT-RP1 digital paper system has a stylus for handwritten notes and highlighting. They do not have handwriting recognition; however, there is a search feature to find occurrences in your document of handwritten characters _star_ and _asterisk_. Personally, I would like to see these two tokens expanded to a customizable set of handwritten search tokens. The Remarkable tablet's SDK was recently discussed [1] here at HN, and this article is inspiring in this regard.