Sony releases APS-C interchangeable lens DC

In 2009 we see Micro4/3 interchangeable lens DC vigorous development, also see Samsung and Ricoh has brought a different style of replaceable-APS-C camera, as the three giants in the field of digital cameras from Canon, Nikon and Sony does not make a difference in this area, are they gave up the fields market? it is clear that the answer is no. That is, before the Nikon said input can help