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 A99, 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.
News: Digital Photography Review (dpreview.com)