For me, killer application is basic usable text input. I'd love to covertly send text messages, write down some thoughts and TODO items, while still maintaining eye contact and following discussion.
For it to be usable, it should not require sight and higher typing speeds should be achievable by training. This rules out virtual querty keyboards and predictive suggestions. I think glyph recognition would be usable, but also other gesture systems would work if they don't demand supervision by sight.
For it to be usable, it should not require sight and higher typing speeds should be achievable by training. This rules out virtual querty keyboards and predictive suggestions. I think glyph recognition would be usable, but also other gesture systems would work if they don't demand supervision by sight.