Canonical has assured its community that the Ubuntu desktop version is not lagging behind the Ubuntu Touch and that they are just aiming towards complete convergence.
After dropping the support for XMir from Ubuntu 13.10, which was one of the announced features of the new operating system, a part of the community has expressed its concern regarding the focus of the development team.
More precisely, Canonical has been accused of putting more resources into Ubuntu Touch and diverting them from the development of Ubuntu desktop, which would account for the decision to drop XMir for the time being.