It is when someone makes bold claims such as "household name".

Artsy musicians ain't it.

Vangelis îs a lot closer to that than Eno, amusingly :-)

He may have been a household name in England. I have no idea. If you're into electronic music, I think you're bound to see him mentioned somewhere because it seems people like namedropping him.

That said, I completely agree that you can't expect any young people to know who he is.