This new multi-touch touch-pad implementation presents support for one / two / three finger tapping, two-finger scrolling, clickfinger, drag-n-drop on clickpads, and single-touch touch-pad support. There's also work underway in the clickpad software button support and better timeout handling. Other possible features include trackstick mode support, disable-while-tapping, pinch/rotation support, and other features.
This new MT touch-pad work is being done by X.Org input expert Peter Hutterer over at Red Hat Australia. Libinput is a library for the handling of input devices by Wayland compositors and also to offer a generic X.Org input driver. With there being multiple Wayland compositors, libinput tries to unify as much of the input handling and support as possible to reduce code duplication or alternative input handling implementations by each of the Wayland compositors.
Those interested in the new libinput work done by Peter can find the new set of 19 patches on the Wayland-devel list.