It is not a new thing. People in the arcade community have been using consumer TVs in arcade cabs for years. I know a few people I have to send pics to when I find any 19" CRT TVs for cheap.
The worst thing about this entire discussion is not that the tubes are no longer being manufactured, but that they are not being perserved for those who can possibly use them. Instead they are sitting in warehouses, or in the dump, or being "recycled" aka being destroyed. This is a society where 99% of the population who thinks that something that is not new, or it is outdated, or not functioning properly, that it is garbage. It does not enter their mind that there is still a use for things like this, or they can still be used in some way, or can be repurposed or even repaired. That is the real concern that people should be thinking about, not that they are no longer being manufactured. We shouldn't need any more to be manufactured. There should be plenty out in the wild that can be used by either the arcade community or by whoever else.