I agree to a certain extent, the 3D technology isnt as advanced as it will be, but people didnt stop buying black and white tvs years ago because they knew coloured tv's would come out eventually...
I love technology too, I don't use the 3D function that much unless its a 3D blu ray film but I prefer it at home to being in the cinema, you can give your eyes a break, have a brew etc and some of the effects are just brilliant.
I personally really enjoyed Avatar and can't wait to watch it on my TV, I ain't paying £70 for the priviledge though