Having just bought a new tv the other weekend and not going 3D I can say it's simply down to the fact I paid £600 for a 42" edge LED LCD panel, Samsung 40" 3D was £400 more, which is a fair whack to watch what, five movies currently available in 3D (non that i like)?
And it's not like there's much due to come out in the next six months - my xbox, ps3 and wii don't support 3D for games yet and my HTPC has an ATi card not nVidia so no 3D there (well, not natively, gotta fiddle with middleware) and at any rate it's not like anything was built to work in 3D so it would all be system generated 3D which won't be as good.
So we're looking at over a year before much 3D content comes out, if any does, maybe another year to see which technology is the winner and by that time we'll have non-glasses 3D tv's using parallax barrier technology or similar and I'll be due a new TV