The 4K and 8K televisions, as well as the "retina" calibre tablets and notebooks are switching to metal-oxide backplanes over conventional silicon, according to Applied Materials which just introduced new fabrication equipment suites for metal-oxide displays: R. Colin Johnson @NextGenLog
Ultra-high-resolution displays require metal oxide thin-film transistors (TFTs) using indium-gallium-zinc-oxide (IGZO, yellow) as the channel.
Applied Materials'PiVot system fabricate the ultra-high-resolution metal-oxide backplanes. Further Reading