Deciding which old classics get the 3DS treatment is probably a more difficult task than we as consumers can imagine. Luckily, we have designers like Shigeru Miyamoto who seem to have a pretty clear idea on what might and might not work.
Speaking to the Guardian newspaper, Miyamoto explained why The Legend of Zelda: Ocarina of Time was picked to be reworked on for the 3DS and talked about some of the differences we'll see when Link embarks on his time traveling adventure in The Legend of Zelda: Ocarina of Time 3D:
We thought the world of Hyrule would be more immersive for the players to experience in 3D and also the horse riding and the thrill of exploring would be heightened... The touch screen allows users to place items where they want and also to display the map. It uses the 3DS gyro sensor to fire Link's bow and arrow and his slingshot, too. This can be difficult with a controller, but more intuitive moving the 3DS around to aim.
When asked if Nintendo had plans to adapt more titles from its library of classics, Miyamoto echoed his words from a previous interview conducted by Edge:
Not really. We would like to create more new titles. For example, this year we are making Super Mario 3D, but it's not really a remake of [the Wii's Super Mario] Galaxy. The Legend of Zelda: Link to the Past could be one of them. I think it would be good to see that world with a layered 3D effect.
We'd certainly be interested in seeing a 3DS version of A Link to the Past, despite series producer Eiji Aonuma's fears that Zelda remakes might have a detrimental effect on gamers' emotional attachment to past titles. Either way, it's good to hear that Nintendo is keen on making new games instead of just releasing straight ports, and that the prospect of having another Zelda classic on the 3DS is definitely something to be excited about.