Fashion in dogs ! The labradoodle was, supposedly, first bred in Australia as an assistance dog which wouldn't moult.
Like all fashions, it will pass.(I'm not saying all are bought as fashionable)Who has seen a Sealyham, Pomeranian or French bulldog recently?All were very popular or fashionable breeds many years ago .Toy poodles were all the rage in the late 1950s (they'd only just been 'invented'). Americans have their own fads and fancies. Golden retrievers, uncommon here, are popular there. The Weimaraner, the Viszla and the Rhodesian ridgeback are distinctly fashionable there (in Manhattan I saw almost as many of those three as you'd see at Cruft's )
At present the market is fuelled by those who want 'something different' which , ideally, a star has. President Obama hasn't helped by naming two he's choosing between. Either the labradoodle market will hit astronomic levels or we'll see a rash of rogue Portuguese water dog breeders appear, and there'll be a thriviing illicit trade in both as imports from the old Iron Curtain countries.Pity.It explains the prices though.