1. An interface apparatus for an electronics system, comprising: a gesture sensor provided near a steering wheel of a vehicle to capture a user's finger gesture; a head-up display configured to display information on a vehicle windshield and to provide feedback in response to the user's finger gesture captured by the gesture sensor; and a gesture processor communicably coupled to the gesture sensor and configured to interpret the user's finger gesture that is received from the gesture sensor to cause the head-up display to display the information based on the interpreted gesture.