In all fairness, while the 16-35 f/4 IS is a fantastic landscape lens, it still fails to do 14mm (which is a big deal for some landscape photogs) so I don't think it necessarily is an answer for Nikon's 14-24; sunstar also looks a bit unimpressive on the 16-35 f/4 IS from most photos I have seen. I think that a wider zoom lens than the 16-35 f/4 IS is on Canon's radar, but that lens may be the patented 11-24 f/4L rather than the 12-24 f/2.8L some have been wishing for. We will wait and see, but there may not be any more UWA action until 2015-2016 as the EF 16-35 f/4 IS and EF-S 10-18mm satisfied a good chunk of the market this year.