Comment by orand

They actually said this in their September 9th press release, although most people missed it:

http://www.apple.com/pr/library/2014/09/09Apple-Unveils-Appl...

"With Apple Watch, developers can create WatchKit apps with actionable notifications and Glances that provide timely information. Starting later next year, developers will be able to create fully native apps for Apple Watch."

Someone from Apple also essentially reconfirmed this earlier today on the WatchKit developer forum.

Edit: here's the source that first tipped me off to this detail hidden away in the press release:

http://david-smith.org/blog/2014/11/06/expectations-for-watc...