They know the empirically proven theory: "Moore's law is the observation that, over the history of computing hardware, the number of transistors on integrated circuits doubles approximately every two years. The law is named after Intel co-founder Gordon E. Moore, who described the trend in his 1965 paper. His prediction has proven to be accurate, in part because the law is now used in the semiconductor industry to guide long-term planning and to set targets for research and development."
in 2005 Moore also noted this cannot be sustained indefinitely and we would eventually run into the limitations of physics (in 10-20 years). There are indications from the semiconductor industry that the rate is already slowing to doubling every three years.
The 5DII with 21.1MP was released in March 2010. A 45MP by March 2014 would be proper then
1DXII, 5DIV, 5DSR, 8-15/4L, 11-24/4L, 16-35/2.8L III, 24-70/28L II, 70-200/2.8L IS II, 100-400/4.5-5.6L IS II, 200-400/4L IS 1.4x, 24/4L TS-E, 35/1.4L II, 100/2.8L IS Macro, 300/2.8L IS II, 600/4L IS II, Profoto B1