[H_L]

The jump from 3840x2160 to 5120x2880 is nearly 2x, in pixel count. That is not just a 'tweak existing technology' kind of jump.

TCON's that can handle a single logical 4K display are just hitting the market, and Apple has one shipping today to handle 5K. A timing controller may be simple tech, but it's cool that they're so far ahead of the curve.

[jsz0]

It's a big jump in pixel count but a 2X increase in bandwidth can be brute forced / tweaked out of existing technology similar to DL DVI or DP MST. IMO that doesn't diminish it at all because lots of technical problems have somewhat obvious solutions but actually making it happen is still difficult and expensive. Even more so if you want to avoid making any ugly trade offs in the process.