From what I can gather, the term exists in large part because it's a pun ("'auntology" = ontology) in French. Kind of how the term "metrosexual" exists because "metro" rhymes with "het(e)ro".
I thought hauntology was more to do with imagined, alternative, might have been pasts and the futures (or possibly present) which didn't grow from that but could have done. Ghost pasts and presents basically.
Although that's not quite what it says here
http://en.wikipedia.org/wiki/Hauntology
Maybe what I'm describing has more to do with retrofuturism and parallel worlds. But I imagine hauntology as a kind of retrofuturist other world that somehow overlaps and bleeds into ours like a ghost.
I like that last sentence.
The thing about the mania for the revival of old styles is that it's been going on forever - imperial Rome's emulation of the art and architecture of classical Greece hundreds of years earlier, the Renaissance taking cues from the Classical civilisations, then neo-Classical architecture in the 18th century, neo-Gothic in the 19th...though I guess with today's pop music the difference is the sheer range of styles and periods that are being recycled or pastiched, be it trad folk, '60s pop-rock, post-punk, synthpop, trad metal, rave or big-band jazz.
A few years ago I was at the Bethnal Green Working Men's Club and there were people there, most of them younger than me, dressed in the costumes of just about every decade of the last century from the '20s to the '80s.