The xinput2 work focused was a quick implementation to see if the xorg stuff worked fine for us and if we need more. It also served to explore what needs to be changed in Wine to support it. Before xinput2 can be merged into Wine a big part of the input code needs to be rewritten and after that xinput2 can be added but this is a huge amount of work and might take months. Nobody is actively working on it, so hopefully it gets finished before Wine 1.2 but I wouldn't count on it.
