I think you will be surprised ...

I suspect that even as 3DTVs come down in price there will still be a premium associated with the 3DTV itself so people will be able to buy a larger HDTV for a similar price; and many people will see the price of the glasses and be turned off of the 3DTV on principle. Even if you're talking about glasses that only cost $50 and TVs which come with 4 pairs, many/most people would be forced to consider situations where they will have friends/family over to watch something (like sporting events) and see the cost of additional glasses as being a fairly major negative against these TVs.

To compare with another new technology, the iPad sold triple that amount in dollars first day.

So you can't really blame it on being new and expensive. People just aren't that interested.