^ We don't really know if all or even most of them models shown at airshows and exhibitions are real projects under development... but some of the models we saw at zhuhai around mid 2006 like pterodactyl, xianglong, the boxed winged xianglong, CH-3 all turned out to be real while a good number of sources including sinodefence stated they were most likely pipedreams... I did too, given the complexity of the box winged uav. Happily we were proven wrong about that a few months ago.
If I had to bet, I'd say the uav models shown are either real, or close to being real. And that's only the tip of the iceberg, given the UCAS and darksword models we've seen.