The real loss was Scophony. That was a mechanically scanned system with a much brighter image. Circa 1938. WWII cut off work, and after WWII, CRTs were working better.
As I was reading it I was really expecting it to end with him being immediately destroyed by the introduction of CRT, but it was pretty inspiring to see that he embraced the new technology, learned from it, and built upon it.
Enthusiasts build working full size replicas.
A "build it yourself" kit ("Televisor") was available (basically a snap-together kit) which comes with a CD with "video" recorded as MP3, you hook up your phone (or computer) to the kit with an audio cable and you can actually see the ghostly moving images. Syncing is iffy but it does work.
They were unreplayable at the time (i.e. there was no way to show them on a Baird Televisor) but have been digitally read and turned into GIFs.