Early adopters paid the costs of being early adopters on this one. I was starting to ponder the idea of purchasing a 3D TV for my next set but I couldn't really justify buying a new TV of any sort recently. Not everyone has that kind of disposable cash lying around. It wasn't so much that 3D costs that much extra (it generally didn't, especially if you didn't need extra glasses), it was that I just wasn't interested in a new TV beyond my 42" plasma.
This is much the same as when I find myself discussing consumer electronics purchases in general; while some people say they buy a lot more stuff online than in physical stores, I find I'm just not buying that much stuff in general. I used to average $1,000 or so a year at best buy, now I spend closer to $200-300 a year and the difference goes to pay for things that are not consumer electronics at all. In other words, in my case best buy isn't losing my money to amazon they are losing it to nobody.