On another rumor site was a link to a blog that talked about the future of DSLRs being FF only:His analysis seems to be ignoring the facts. The cost of the sensor. Wafers used to make camera sensors are not cheap run of the mill wafers, and the yield from a given wafer generated 10-20 times the number of APS-C chips. This means the cost of a FF sensor is at least 10X the cost of a APS -C sensor. And, since the cost of parts used is subject to a percentage markup, that further increases the price of a FF sensor.
Just how much the cost to manufacture a FF sensor has dropped over the last few years is unknown, but they are not cheap. Switching from 8 in to 12 in wafers certainly helped along with single pass capable lithography equipment. But, you can always get 10-20 APS-C sensors for the cost of one FF sensor.
When 18 inch wafers hit the market in about 2018, that will further lower the price, but the ratio of APS-C to FF from a wafer will likely still be over 10:1