Oh yes there are people who buy gadgets or equipment in any domain for the novelty factor or bragging rights. My future father-in-law has a saying "He who dies with the most stuff, wins..."
My kryptonite like most others here are electronics. I can fairly say that I've only succumbed twice in my adult life. The first purchase was a Swatch Spot watch. I fancied it for the nearly a month and naively thought it would that it would revolutionize my life. My second and last folly was the Archos AV500 PVR device. It cost me $500 US dollars.

A fantastic device to be sure, providing one actually uses it during commuting instead of constantly napping.
I can say with confidence that I will heavily use my Iliad, as I'm a voracious reader. I will also be able to conveniently keep my work pdf documents when visiting clients, instead of pulling them out from the intranet only to print and discard them not long after.
Hmm... Perhaps I will also have to buy a scanner for home?