This does seem silly, can't see why anyone would want this over the tamron f2.8 vc.
I imagine superior IQ would be the selling point for the f/4 IS but I cannot see that happening if Canon puts a price tag north of the Tammy
70-200 F/4 $629 (<-- an absolute bargain like the 17-40L is)
70-200 F/4 IS $1,099
70-200 F/2.8 $1,299
70-200 F/28 IS II $2,099
Extrapolating this to the 24-70, this might look like:
24-70 F/4 $1,099?
24-70 F/4 IS $1,999?
24-70 F/2.8 (II) $2,299 (<--- this one exists for sale today)
24-70 F/2.8 IS $3k+? Rare stamps? Left testicle?
Was thinking exactly the same - if the current 70-200 pricing is a measure, the f/4 IS would cost way above the Tamron. Not sure what kind of IQ would make up for the smaller aperture + the price differrence... Interesting out of a marketing point of view though, we will see what Canon marketeers have thought this time
either this lens is like 800USD MSRP or its DOA.