awinphoto makes a pretty good point here. I have the feeling that canon does know that this is a bit of a hole in their lineup, and just as they recently cranked a [stunning] 200-400 f/4 to match/surpass Nikon's, I have a feeling it won't be long before we see a 14-24mm f/2.8 L from Canon. after all, it's very clear the demand is there, and that people are willing to pay the premium for this lens, so it's just money waiting to be earned by Canon.
the recent comments about canon now diverting focus to its wide angle lenses makes perfect sense as they have pretty much run the gauntlet as far as telephotos go at this point (expect perhaps updating the 300 f/4 and 400 f/5.6 ... but those will probably wait a couple of years until everyone has bought the high-end II-series lenses)
Thanks... You know, I dont envy the canon lens design engineers... Not only do they have to find new ways to design these lens elements to bend light and not only meet up in unison to create a sharp image, but also get enough light lined up to create a sharp image across the entire frame, and oh yeah, consumers want a 2.8 aperture, oh and it cant be too similar to Sonys/Nikons/Carl Zeiss/etc patents... And then once it's all done, how to make it at a price point where people would want to buy it... Then again thats why they make the money they do... To invalidate "lesser" lenses such as the 17-40/16-35 especially compared to the 14-24 is just not the same, they are two separate animals, different strengths... I do think at one day sooner than later Canon will once again own not only the telephoto lineup but also the ultrawides, but until then there are options... There's TSE lenses which you can rent if need be if you need those critical shots, do pano style shots with 50% overlaps so the sweet spot of the lenses cover the entire scene you wish to cover, merge in photoshop... Quick, easy, and can make stunning photos... That's how I made many of my architecture shots...