Underlying Epos software is used to convert vibration and coordinate information into text, and from there, any 'ole text app can be used to field the results. We were even shown a brief demo of a prototype language translation app that enabled the demonstrator to write a sentence on paper beside the phone, and have the phone itself take in the English phrase, convert it to text, and then translate into a foreign tongue. It's a fairly impressive feat, and there's some pretty obvious usage case scenarios here -- this could easily reinvent the art of note taking in class, where those who prefer to jot down reminders on paper will be able to log those same bullet points on their laptop as they scribble. Vid's after the break, per usual.
Qualcomm / Epos ultrasonic pen handwriting demo at MWC 2011