I've been pondering long and hard all these news stories regarding the 'air guitar t-shirt' and have decided that in all fairness, that's not airness.
I've decided to establish some basic principals of air guitar:
1. Air guitar is not a virtual instrument.
2. Air guitar is an instrument that exists in its absence.
3. Air guitar playing does not mark the lack of an instrument, it traces the presence of an absence of an instrument.