I've been curious about that as well. Was more thinking about on/off ease for commuting, but it sounds cool in theory. Would be cool if it folded enough to fit in the pannier when not in use. On/off ease with a fully loaded pannier and ability to carry would be key deciding factors for me.
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Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"