Amen, finally a replacement to the embarrassing prehistoric EF 35mm.I'm very glad Canon is updating the 35/2! This update is long overdue. It will be wonderful to have a small, quiet, high-quality 35 — I'm assuming it will be high quality. I hope the 50/1.4 is next on the list of updates.
Or even a good 50mm f/2 USM (with IS hopefully!) would make me happy.....
The more I think about it, I do see a 50mm fast prime with USM and hopefully also IS coming up within the next 12 to 18 months..., probably sooner? A fast 50mm on a FF would be helpful for video (not that I'd use it for that.. ) I want to use is on my 7D as an equivalent 80mm fast prime....
The macro capability of the 24-70mm f/4 USM IS is a definitely bonus, and I don't underestimate how difficult that was to implement an almost 1:1 on a zoom lens like that.
But on a FF, 70mm is too short for me.... I like at least equivalent of 120mm in my walk-around lens (horses for courses). That's why the 15-85mm on my 7D is so handy, covers the focal range that I want (equiv: 24 - 136mm) in a '1 lens travel solution' - while having great IQ across the range!
I'm sure many FF users (eg 6D camera purchases) will snap up the 24-70mm f/4 USM IS, particularly if it has great IQ. It would make a great budget(ish) 'travel landscape zoom' with the 6D.