EXPreview have posted some interesting news/rumor/talk about the upcoming 28nm-based NVIDIA Kepler GPUs where forum friend of EXPreview "phk" posted an article saying:
During the week of March 15th, there comes with spot goods, NVIDIA won't follow AMD in spite of tight schedule.
Although phk doesn't state which product/s will debut, it should be an NVIDIA Kepler-based product. Whether this will be a paper launch, or a proper launch, I guess we'll have to wait and see. NVIDIA will need to release something, because if they don't, AMD will have a near top-to-bottom release of their GCN-based cards before NVIDIA even drops a single Kepler GPU. Can Team Green do it?