In the 70s I was a Rank Xerox engineer. A new range of photocopiers was introduced that had nixie lamps. When I asked one of the designers why they hadn't used LEDs he said the marketing people didn't thing the customers would accept them!
You can pick up a kit to make your own Nixie clock for £50 or less.
I like the bottom one on that page, the bare one in the glass/perspex enclosure. Not sure I'd pay nearly $300 for one, though.
Slightly more colourful: