I read this as a fact not long after 4.4 was announced, but probably longer than I remember it, so I'm not surprised at all. I tried looking for where, but I can't seem to find it now. :/ Pretty sure it was on G+, or it could've been here. I need to start bookmarking things that are actually important and not just funny pictures of cats. Maybe someone else saw it too. I don't recall for sure, but I think it was said that some features were exclusive to the Nexus 5, like the widgets and swiping for Google Now and all that, as sort of an experiment, and depending on feedback might be implemented for other devices. It's possible that the "OK Google" from the home screen might be limited to the S800 and future chips with similar capabilities though.