To determine if your "3D-Ready" TV is a 3D TV you need to check the reference materials that came with your TV. Some older HD TV sets indicate they are 3D-ready, but you'll need to check what that means for your particular brand and model.
What if my "3D-Ready" TV is not a true 3D TV?
If your HD TV is not a true 3D TV, check with the manufacturer to see if there is an update or upgrade that makes it 3D-capable.
I just bought a new HD TV, how can I tell if it is 3D-enabled?
Newer 3D TV sets clearly show or indicate that they are 3D-enabled. Look for the 3D logo either on the TV or in the materials. 3D enabled TV sets bring specially created/encoded 3D content to life in a way that a 2D HD TV cannot—by creating even greater depth.