Of course IS doesnt account for subject movement but thats not the point
I dont think anyone ever said it did
Its just silly that people continuously argue in a very aloof manner
"that IS is not needed on wide to normal focal lengths"
Fact is it helps in alot of situations and no its not going to help freeze the subject
but there are many other ways of dealing with that such as flash
personally all else being equal I would rather the lens i'm using have IS than not
now that being said the only lenses I use alot that even have IS are the 24-105L and the 70-200f2.8L II
since the 24-70 does not have IS i prefer to use the 16-35 I can still shoot this lens comfortably at 1/20th second and keep the shot sharp and 1/10th if i really try.
I would LOVE an improved 16-35 with IS (let all the dogma preaching sheep now give me a lecture about how I dont need IS at those focal lengths and I must have no idea what i'm doing)
If a good quality 24-70 f2.8 with IS came out from either canon or sigma I would more likely use that more often
(I cant live with Tamron build)
and as for canon putting IS on primes, I think its awesome, I wonder if this trend will translate to more future L primes. I certainly hope it does i can only imagine how cool a 35mm f1.4L IS would be.... or a 50f1.2L IS and 85 f1.2L IS, 135 f2L IS