7D has been out about 2 years. It is the first camera of its kinda, but it will probably be replaced over the next 6mo. I would expect an announcement within the next two months.
Same with the 5D Mark II. It has been out three years. It was announced when the 5D I had been out 3 years.
The 1D Mark IV has been out since 3Q 09. The 1D Mark III was out for 2.5 years before the IV was announced. It was about 3 years between the Mark II and the Mark II, but there was a middle camera, Mark IIn that was released about halfway through the cycle.
So all three top of the line Canons are due to be replaced or updated in the next 6mo.
Same with the 5D Mark II. It has been out three years. It was announced when the 5D I had been out 3 years.
The 1D Mark IV has been out since 3Q 09. The 1D Mark III was out for 2.5 years before the IV was announced. It was about 3 years between the Mark II and the Mark II, but there was a middle camera, Mark IIn that was released about halfway through the cycle.
So all three top of the line Canons are due to be replaced or updated in the next 6mo.