Sigma announced a few lenses, which include two updated lenses and one brand new lens for Micro Four/Thirds and Sony E-mount, and one updated lens for APS-C digitals.
The two updated MFT/E lenses are the 19mm f/2.8 and the 30mm f/2.8. The first renditions of these two lenses were somewhat under the radar for most photogs, but the people who bought seemed to love them. They had some seriously good image quality. The new lens in this group is the 60mm f/2.8,which is the equivalent to an 120mm lens for MFT and 90mm for the E-mount. With its minimum focusing distance of just under 20 inches, this will make a very nice portrait lens, and like the other two, will be small and portable.
The other lens for Sigma is a new version of their 30mm f/1.4 lens for APS-C digitals, which makes it more or less a normal lens for that format. The previous model was known for its high quality images, especially in its smooth out of focus foregrounds and backgrounds, or bokeh. I'm sure this version will continue this same quality.
Also of interest from Sigma is something called a USB Dock, which attaches to your computer and when you attach the right Sigma lens to it, you can update its firmware and adjust its focusing, in both accuracy and speed. Not all Sigma lenses will work with the USB Dock, but the new 30mm f/1.4 will, once it is available.
And finally from Tokina is a new lens for APS-C cameras, the AT-X 12-28mm f/4 PRO DX lens. It replaces the 12-24mm f/4, which is a lens I owned and used and loved. It was a very fine lens and I'm sure the new version is just as good.