Are various forms of antiquated displays going to become obsolete?

They will surely continue to be sold, but only for niche applications. Like those primitive record players. Still popular among DJs and Audio Fanatics.
But for the majority of uses, they will become obsolete.

I though maybe CRTs were at least still being used in waveform monitors/oscilloscopes but according to this Wikipedia entry on waveform monitors they are not. From the entry:

Modern waveform monitors and other oscilloscopes have largely abandoned old-style CRT technology as well. All new waveform monitors are based on a rasterizer, a piece of graphics hardware that duplicates the behavior of a CRT vector display, generating a raster signal. They may come with a flat-panel liquid crystal display, or they may be sold without a display, in which case the user can connect any VGA display.

wild

They’re dead technologies walking.