On their website, Techpoint, owner of the TVI standard says:
Techpoint brings the next generation of HD-TVI technology to you with HD-TVI 3.0!
Now HD-TVI 3.0 supports up to 8 Megapixel or 4K resolution video while maintaining reliable distance performances of over 500 Meter on a copper core 3C-2V coaxial cable. Now HD-TVI 3.0 DVRs are now even compatible with other popular HD analog standards!
Although no 4K cameras that I know of are shipping, it would appear that it won't be too long before they do.
How cheap might they be? $150? Lower?
Enough to make a diehard IP guy give it a shot?
IMHO, this is the next wave of price devastation, and has the capacity to end the 4K party before it really got going.
Now that AHD, CVI and TVI all share a common standard, prices are bound to come down even further due to lower distribution costs.
Possible downside, frame rate has not been announced for 4K, could be ultra low, ~7 FPS, based on extrapolation.