From an interview with Hiroshi Takashima (General Manger of Imaging Division at Nikon) at Photofair:
Q: What can we expect from Nikon in 2010?
A: We plan to surprise the market. We will concentrate only on better quality and better line-up of cameras. So you can expect surprises.
Me thinks the surprise will be the rumored Nikon EVIL system. What could be considered a "surprise" in the DSLR world?