Technically, Asus only posted a partial silhouette, but that looks like a watch, right? It's not a phone or a tablet, so that really just leaves a smartwatch, which is all the rage right now. Also "Time has been transformed..."
— ASUS (@ASUS) August 19, 2014
So what can we tell from this image? It's not going to be a round watch, and that's pretty much it. It's odd that Asus hashtagged "incredible." All the other tags in Asus' tweets are specific products or brands. Perhaps this has something to do with the name? Asus also uses "incredible" in its slogan, though, so it's hard to say. We'll find out on September 3rd.