Although companies are experimenting with different methods to simulate 3D, marketing expert John Peddie says the advantage of Nvidia's system is that __________________________.  

"So the game developer doesn't have to do anything. Game developer can say, here's my game, you know, enjoy it. You can enjoy it in 2D in an old monitor which is 60 Hz, or with the aid of the Nvidia stereo system you can enjoy it in 3D with their glasses and their sensor and their magic secret formula software."  

But some companies are looking beyond. Sony and Toshiba are developing competing technologies to do away with glasses altogether. Sony Home Entertainment Division chief Yoshihisa Ishida says the company hopes to be first, but he says __________________________.  

"Once all the technical elements are ready, I think the ultimate shape of 3D TVs should be the one watchable without the glass, as it is easier. But before we reach that stage, we will have to solve the technical matters as well as the price issue." 

But home 3D will not come cheap. Upgrading a computer using Nvidia's system will cost about $600, with glasses priced about $200 a piece. 3D-capable TVs that__________________________. Without the glasses, a fantasy world that looks so real you can almost touch it will almost certainly cost more.

(1)it works with games that were not designed with 3D in mind
(2)a launch date has not been set
(3)require glasses already sell between $3,000 to $5,000