DVDs don't come in the modern 3D format, only Blu-Ray, and your cable provider may have a 3D VOD/PPV channel.
To watch the modern 3D format, you need a 3D capable TV and its glasses, a 3D capable Blu-Ray player or game console, and 3D Blu-Ray movies, or a 3D capable box from your provider, and subscription to the service needed access their 3D.
The old fashioned 3D will work fine though, regardless of what player or TV you have.