There’s no doubt: 3-D TV is spectacular. It has such depth and realism it magically transforms the TV screen into a world you can almost touch.

But before you join the early adopters and head for the stores, consider cost and content. Not only are the televisions coming on stream at premium prices, they require extras such as 3-D glasses (some TVs come with two sets; you’ll need more for family and friends) and a 3-D Blu-ray Disc player. Nor is there much 3-D material to watch at the moment, although you can expect several dozen Blu-ray movies to be available by the next holiday season.

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