Here's some info from Gyration, a company that nintendo invested millions into a few years back
"
The MG1101 is a low-cost, dual-axis miniature rate gyroscope that is fully self-contained for easy integration into human input devices such as computer mice or remote controls. Its unique tri-axial vibratory structure offers high reliability and low manufacturing cost. Internal mounting isolates the vibrating elements, greatly decreasing drift and improving shock resistance. The module can be mounted directly to a printed circuit board, without additional shock mounting.
The MicroGyro is well suited for low voltage products operating between 2.3 and 3.6 volts. Its low current consumption is enhanced by a low current sleep mode. A temperature sensor is provided for the most demanding applications and a voltage sensor allows simple detection of a low battery condition for battery powered applications. The MG1101 further includes 1K of available EEPROM storage on board.
Suggested applications are human motion tracking, computer pointers, TV remote controllers, game controllers, robotics, factory automation, antenna stabilization and auto navigation.
MG1101 Features
¤ Low cost
¤ Two-axis sensing
¤ Miniature size
¤ Extremely lightweight
¤ Low drift
¤ Internal shock mounting
¤ 2-wire serial interface
¤ 1K of usable EEPROM
¤ High temperature stability
¤ PCB-mountable
¤ Integrated analog-to-digital converter
And about precision, i would think a computer mouse requires much more precise detection than a controller would
Thats the exact opposite of what i think, cept of the cost, of course that will be higher, but Gyros would add a whole new level of simplicity.
Here's what i said in another thread
I think it would be a lot more precise than any analog stick, especially dual analog stick games, coordinating them can turn off many gamers, including my brother who could never get into console FPS with dual sticks. Dual analog sticks are anything but simplicity and you miss the whole button layout function UNLESS for a few secs you let go of the 2nd stick and go press the button with your thumb, thats a few secs where you're no longer in total control of your action, with games that have a lot of weapon switching, jump/crouch, and other functions on the gamepad's button layout, dual sticks are just hindering them.