Michael brings up a good point, although I don't completely agree here - because I feel that given the rate in which major technological advances are occurring, 24 months is actually quite a long time. We're only 36 months out from the iPad and people have been demanding a "game changer" for some time now.
But the 24 months/trend issue aside, I think what's more important to realize is that the way we are going to consume information is changing drastically. I do think we should take into consideration how much information can be displayed on Google Glass or Pebble or an iWatch, because those devices are the future. So to me, when it comes to UI design, what's critical is information structure.
What we'll be talking about in 12-24 months won't be flat vs. texture but the way in which information we can't visibly access at the moment is located within our mind's understanding of the "computer" that stores it and the "device" that will display it. Because, for better or for worse, as all of our personal data is stored on our own devices less and less, people will begin to start thinking about that data in a new way. And the way we display it on hand, and in structure, will matter far more than what it looks like.
I hope that makes sense, it's a fairly new topic for me and I don't have a ton of practice explaining myself yet :)