Don't worry Tony, there will always be diehard purists, the majority of fowl breeders/keepers aren't actually such scatterbrained fad-chasers as you might think. Even people who know next to nothing about animals in general tend to do a lot of research before getting any chooks; if only more people did such research before getting dogs and cats...
Look at all the heritage breed stewards, it was predicted all these breeds would be extinct by now, but the devotees have hung in there. Same for pheasants. For some, other birds will never compare, so there will always be those protecting the lines. And about any hybrids, as people have already said, they will likely be one-offs, they are rarely fertile beyond the first generation, never mind the second or third. There is basically no chance this will go anywhere except in an educational/entertaining direction, it's not likely to shake up the industry with a trend-setting popularity.