Somewhere - maybe Banggood? a few years back I saw a most remarkable product - a keychain VHF TV receiver, and not expensive either. It was a real "how far we've come" moment for me.

I didn't buy it because I had no use for it, and now I can't find any references to it anywhere. I suppose its essential uselessness caught up with it, no matter how cool. I wish I'd bought one :(