because it's cheaper then all current competition products, does everything it can nice and smoothely, has great "fan" support and still big possibilities with dingux.
At the state it is now, it is a great product for everyone who likes playstuff but is too lazy to work on it themselves: Firmware is nice and user friendly, it is easy flash-able with good customized firmwares, even if you fuck up there are ways to get it working again. And for people that like to play a bit more, the installation of dingux also got easy and smooth and offers a lot of new options for everyone interested in old school gaming.
The next interesting thing for "normal" customers would be the same as a dingoo but + 3D chip and more power, so more newer consoles could be emulated, but to get everything working as smoothly as it does on the dingoo now, the fanbase will take some time. For everything else, a dingoo is nearly perfect with an currently unbeaten value for money.