The "Alps Pointing-device" is typically the name for the driver that supports the touchpad (or trackpad) on laptops that use Alps Electric technology. Alps Electric is a manufacturer of various input devices, including touchpads, which are used by several laptop manufacturers, including Sony VAIO.
If you're seeing a reference to Alps Pointing-device on your VAIO laptop, it means that your laptop uses an Alps touchpad, and the driver for this device is responsible for managing its functionality (like gestures, tapping, scrolling, and sensitivity).