Although it's by a chinese/thai company, it's going to be available.
Now I dont really think that kind of pixel density is going to be useful for most people, but the specs are extremely impressive.
A 5 inch screen, followed by a thickness of 6.65mm(!) and a krait s4 pro chipset, which's running 4 Cortex A15 cores. It'll also have a 2500 mAh battery, which is quite alot, considering the small form factor.
Sadly it looks like it took some design ques from longphone, but either way, it seems to be an impressive device.
Also HTC will also be releasing a phone with the same screen, but unknown sofar specifications.