On their forum, Literature and Latte has just put out an appeal for a programmer to help get Scrivener for iOS written. This means even more delay before we get this — so no chance for summer 2015 and Christmas might be a challenge in my view. In their own words, it is still not ready for beta testing.
If you are a programmer, or want to refer one, the job details are: Wanted: iOS Developer. I worry this might be the turning point for people who start looking elsewhere for a multi-platform tool for writing. Is this the beginning of the end of Scrivener’s dominance?
Update April 2016 and Scrivener finally enters beta testing!