estimated at $50 and available in 2014 ?
This video demonstrate PixelTone, a research prototype app that uses voice-control and touch to control photo editing operations. PixelTone is a collaboration between researchers at Adobe Research and University of Michigan, and will be presented at the ACM CHI (Computer-Human Interaction) conference this May in Paris.
More details can be found here: http://www.gierad.com/projects/pixeltone-a-multimodal-interface-for-image-editing/
Try it out on http://audiolip.com