Microsoft and Sony both had booths showing off their next-gen consoles, but, honestly, the new hardware has a relatively small footprint on the show floor. Instead, it looked like most developers decided to simply stay the course, pushing out new games for the PlayStation 3, 3DS, and Vita instead of preparing for the impending generational switch.
This, most likely, is tied to the delay of next-gen consoles landing in Japan. With Microsoft and Sony both stalling their Japanese launches to 2014, Japanese developers don't necessarily have a strong reason to show off their shiny PS4 games. Maybe next year, when the consoles are actually out, we'll notice a difference, but in 2013 it doesn't appear as though Japan cares much about the next-gen.