This projector is using the .47 TI DMD which is a native 1920x1080 panel. The image is shifted 4 times to simulate 4K.It says so in the specifications for the laser projector that is to be released at the end of the year
But maybe it's fake 4K?
historically these smaller DMD's have taken a large hit on native contrast, some in the 400-600:1 native contrast ratio range. The larger .66 2x shift DMD's have a bit better native some closer to 1000:1.
hopefully JVC did good work with the laser modulation which could help with the perceived contrast.