Kepler is the successor to the successful Fermi series of GPUs from Nvidia. The first lower-mid range chip GK107, probably meant for notebooks. This chip, manufactured on a 28nm fabrication, will have a 128-bit memory interface and will support DDR3 and GDDR5 memory. This chip might come out as part of 600M chipset to replace the current Nvidia 500M chipset that is found in current generation notebooks. The production samples may come out by January 2012
This would mark the beginning of a new fight between ATI and Nvidia. While the last fight was won by ATI, it will be interesting to see whether Nvidia can take the next one.