One piece I don't understand is this,
So, by ABI's definition, my HTC One X and Galaxy S3 are "phablets" ?
This definition is misleading. These days, all tablets can be phones and any smartphone can be classified a tablet in some sense.
Many people cite the Xoom as a tablet with phone capabilities through software based dialers. It is in all aspects by the definition of the article, a phablet.
The new Nexus 7 with Jelly Bean has shown a few pics of a dialer installed. Whether it is a portion of the OS included for smartphones or not, it will then have the capabilities to make phone calls, stock. That makes it a 7" phablet, by the articles definition.
On the other side of the coin, you have the iPhone. It is a 3.5" screen that is primarily a phone. It also has the capabilities to run apps that are normally used on a tablet. I mean, iOS is just a generic OS that works on the iPad as well as the iPod and the iPhone. Hmmm, maybe the iPod and iPad are phablets, too?
These days there isn't much seperating a tablet from a phone except for screen size. The same predicament comes up in the PC world with laptops. What differentiates a power laptop, a netbook and a ultra-portable? Usually just screen size and some hardware specs.