Attached is a very short video of a full panel test.
It shows that the PSoC 4 is capable of driving 3,072 independently addressable LEDs with no caveats.
Each pixel can be configured separately.
The design makes use of the PSoC 4 SCB, Timers and UDBs.
All of the articles written thus far have lead to this point.
If you search through the Internet for WS2812B controller designs you will find that most if not all say that you must bit bash or bit bang an output port to produce a valid WS2812B protocol.
This design does no such thing and is able to produce the protocol by using the inbuilt features of the PSoC 4.
In fact it is possible for the PSoC 4 to refresh the display whilst performing other processing for fast performance.