After the keynote, we managed to ask Jen Hsun Huang, Nvidia CEO, a single question. We asked, where is Kepler? The answer we got was that we have to be "patient" about it.
Furthermore, we discovered that there was an internal discussion to showcase Kepler at this keynote but Nvidia decided not to. As far as we know, it was a business decision to wait, and Kepler is production scheduled to launch at a later date. Current estimates are that it will launch in first half of 2012, possibly sometime late in Q1.