1. A headset computer device comprising: a microdisplay driven by a processor; a microphone configured to provide user utterances as input to the processor; head tracking circuitry configured to provide orientational sensing information describing an orientation of the headset computer; a joint head-tracking and voice command text selection module configured to receive the user utterances and orientational sensing information and produce user input based on the user utterances and orientational sensing information; a speech processing engine, executed by the processor, the speech processing engine configured to (i) transcribe the user utterances and display resulting transcription text on the microdisplay, (ii) be responsive to the user input directed to editing the displayed transcription text, and (iii) provide editing assistance using fuzzy matching.