WTF is the point? AYN Thor is quite powerful and makes great use of space (top screen uses nearly all the space, and for being a pocketable handheld, its screen is quite big), whereas this almost takes DS Lite's layout tit-for-tat. Even the aspect ratio.
I can understand a versatile and powerful clam-shell device, but a low-power DS clone? Why? There are a ton of DSes in good condition, and flash carts exist, enabling the same experience of having a ton of games portably for a lot less money.
The only advantages I can think of in regards to DS games are a (potentially) higher resolution screen and the possibility to use sticks in games like SM64DS. Everything else sounds like a hindrance.
Knowing the existing (3)DS clones, if the touchscreen(s) would be capacitive, you'd need to carry a much larger stylus. I highly doubt that Download Play would work, though there may be emulators that implement it for all I know.
I guess this is for people who want to emulate a few more old systems than the DS can on a device designed around DS. I can understand the desire for the form factor, except I think this is the least interesting handheld to go for it. If it is so hyper-fixated on the DS while limiting itself to a sub-$100 price point, it looks more like a collector's item to me...