Sony has announced it plans to release several firmware updates for A-mount and E-mount systems on February 4, 2013. Updates to Alpha and NEX bodies relate mostly to lenses, including the addition of Dual-AF support for 11 lenses on the A99V, and Fast Hybrid AF support for six E-mount lenses on the NEX-5R and NEX-6, among others. Three E-mount lenses also get updates to enable Fast Hybrid AF support. See table below for more detail on which bodies and lenses will get updates.

http://www.dpreview.com/news/2013/01/29/Sony-to-release-firmware-updates-for-Amount-and-Emount-systems