I guess the point I was trying to make was that the Networks ALL invested in either 720P or 1080i cameras and infrastructure in order to provide HD resolution.
THEN shortly thereafter it was "reveal" the these two resolution formats were not really "True HD" and that 1080P is "really" FULL HD which promoted the sale of 1080P displays/projectors
4K or 2160P has been sold as the "next step" although there are few networks that have jumped into that 2160P pool... as I recall it was when pro sports began to broadcast in either 720P or 1080i that helped sales of "HD" displays/projectors.
Now BEFORE 2160P has been adopted by any broadcast network we are seeing 8K or 4320P panels and 8K e-shift projectors.
I do not think that any major network would invest in 2160P equipment when they see what display devices are now on the market and will only grow by this time next year. I would expect that every display device producers will be shown 4320P panels at CES 2020.
How would you explain to shareholders that you converted all your equipment to 2160P but you look across the street to see you competitors broadcasting in 4320P.
The content providers are placed in a very difficult spot by the display producers .... do we need 8K instead of 4K probably not but from a marketing perspective you would be in a secondary position if you could only do 4K when your competition does 8K.
I would be just as happy if the networks made the decision to convert to the 2,160P format and if folks wanted "8K" then they could rely on the device to upscale the native 2,160P signal to 4,320P.