Does it have composite inputs ? ;)

Meh. At a resolution of 4096x1716, and using the physical dimensions in the article, it has a "dot pitch" (pixel size) of 1.5 mm (or 0.66 pix/mm.) A 14", 4:3 VGA monitor at 320x240 has a pixel size of 0.875 mm, or almost double the resolution of this thing. A 19" 1280x1024 LCD panel from 2007 has 0.29 mm pixels, beating the 6m behemoth by a factor of 5 (and matching the VGA CRT at its theoretical highest resolution.)

In other words one pixel on this thing is roughly equivalent to a block of 5x5 pixels on whatever you probably have on your desk. Talk to me when they make a "20k" version. 😜

(Edit: if you happen to have a Retina Macbook make that a block of 14x14 pixels. Or 18x18 pixels on your Apple Watch.)

Impressive. That's more of an alternative for a video projector or maybe even a small cinema screen.
Weight aprox. 800 kg, typical power consumption 2,85 kW 😀