Are there any 3 dimenional input devices?if yes,list and explain some of these devices and whether or not you expect them to be handy in the future.

Yes.

Keyboards

Main article: Computer keyboard

A 'keyboard' is a human interface device which is represented as a layout of buttons. Each button, or key, can be used to either input a linguistic character to a computer, or to call upon a particular function of the computer. Traditional keyboards use spring-based buttons, though newer variations employ virtual keys, or even projected keyboards.
Examples of types of keyboards include:

• Computer keyboard
• Keyer
• Chorded keyboard
• LPFK

Pointing devices

Main article: Pointing device

A computer mouse

A pointing device is any human interface device that allows a user to input spatial data to a computer. In the case of mice and touch screens, this is usually achieved by detecting movement across a physical surface. Analog devices, such as 3D mice, joysticks, or pointing sticks, function by reporting their angle of deflection. Movements of the pointing device are echoed on the screen by movements of the cursor, creating a simple, intuitive way to navigate a computer's GUI.

High-degree of freedom input devices

Some devices allow many continuous degrees of freedom as input. These can be used as pointing devices, but are generally used in ways that don't involve pointing to a location in space, such as the control of a camera angle while in 3D applications. These kinds of devices are typically used in CAVEs, where input that registers 6DOF is required.

Composite devices

Wii Remote with attached strap

Microsoft Kinect sensor seen here on a TV, works by detecting human motion visually

Input devices, such as buttons and joysticks, can be combined on a single physical device that could be thought of as a composite device. Many gaming devices have controllers like this. Technically mice are composite devices, as they both track movement and provide buttons for clicking, but composite devices are generally considered to have more than two different forms of input.

• Game controller
• Gamepad (or joypad)
• Paddle (game controller)
• Wii Remote
• Microsoft Kinect Sensor

Imaging and Video input devices

Video input devices are used to digitize images or video from the outside world into the computer. The information can be stored in a multitude of formats depending on the user's requirement.

• digital camera
• Webcam
• Image scanner
• Fingerprint scanner
• Barcode reader
• 3D scanner
• Laser rangefinder

Medical Imaging

• Computed tomography
• Magnetic resonance imaging
• Positron emission tomography
• Medical ultrasonography

The Future Researchers have been working hard on inventing new modes of Input. The new way in which we would interact with Computers, and mobiles. Unlike other modes of Input we’ve seen in the past, this could be a game changer.
Chris Harrison and a team of researchers are showing off a method of  ”Using your Arm, Hand and Skin as an input device“.

They have been able to workout a technique that detects where the tap touches and use that to control phones and music players and computers. As a result, An arm band worn by the user picks up acoustic signatures created by tapping on your arm with the other hand, or taping your fingers and thumb together on the same hand. They’re achieving accuracies in the 82-97% range but it gets even better.
“The human body is the ultimate input device,” said Chris Harrison who had been working on the project after experimenting with similar other like Scratch Input to control PC, music, etc.
Device: Your Skin