From what I gathered 8003 panel is not as bright as U9GT2 "LG" panel and it's by Chimei. My guess it's a 200 lumens panel which is the same brightness as T.A10/Momo11. From the photo I don't see a warm cast.
Wifi is similar to that of Aurora, which has the same strenght as Galaxy Note. Meaning it's decent to good

6800mah (some reported actual is 5800mah) battery should give it a 4+hr running time with wifi on. Should be able to make it to 5 or more hours with tweaks.
What I like is that it has 2 speakers, which most of the 999 RMB tablet doesn't. Disassembly shots shows it's pretty clean IMHO. The design looks like a Bmorn V99 which is good. Build looks decent too. Case wise Ipad1 should fit.
My only worry with it is the firmware support. The lack of International or even local commnuity might be a problem. But if given a choice of V99, D90, 8003, I would gamble on 8003. lol
Edit: Uppo 8003 IPS screen
http://youtu.be/Ie3kDsdzEW4
Edit: I just look at the view angles shots again. Looks like the IPS aren't as good as LG ones. Theres some color changed, although it's much better than those normal screens. Overall color is actually very pleasing

I'm tempted