[Xamayon]

It's far worse than just being able to listen to music, with the right receiver and software you can decode the image from the monitor. Here's a quick overview. https://hackaday.com/2020/05/14/tempest-comes-to-gnu-radio/

I have verified that it works with my equipment (alarmingly well), though higher resolutions are harder to get a clear image out of. It even works with multiple monitors in close proximity, you just have to select the right parameters. Having an appropriate antenna helps avoid interference and improve the quality.