At best that article is poorly written and overlooks that nearly everything mentioned by the author has been a trend for the last 3 years (Being generous here).
Half of the crap he mentions as a 'trend' has been in discussion for HTML5 for years (The web based stuff), and most of the app based stuff has been utilized for quite a while (Gestures, seriously?)
New colors? This is a trend? If so, it started all the way back in the 90's.
Lets not forget designing for humans... Calling this a design trend is simply retarded. If it isn't built for a human, the designer should be shot or banned from designing.
Flat design begun to get picked up quite a bit last year with ICS and WP7, both of which lack skeuomorphism, which is most widely used by Apple and Mac designers (Generalizing).
The author seems to have confused this with the last few years, because there was quite a bit he could have covered that was newer, or at least accurate for a prediction, rather with going with the safe bets of the last half decade.