Generally, it seems that if a device has phone capabilities as well as smarts plus a large screen, it's called a smartphone anyway. So there are devices like the Samsung Galaxy Note with a fairly large screen and lots of smarts that's classified as a smartphone, and can do everything a tablet does.

So far, the term "tablet" seems to be reserved for devices without voice cell capability. It's an artificial distinction, of course, because you can install Skype or lots of other Internet phone services on a tablet. I use Skype for video calling on my 7" tablet, and it seems perfectly natural to carry around this thing with somebody's face on it talking to me, and even to answer.

It's an annoying conundrum because voice cell service has been obsolete for years, and we're only forced to use it because it's profitable for the phone companies (both of them...we're almost back to a monopoly now, just AT&T and Verizon controlling almost all of it). Nobody makes the cell phone I want: Basic voice, voicemail, and text...and a 4G wi-fi hot spot for when I want to fire up my tablet and do the fancy stuff. I'd have basic communications I could carry around in my pocket at all times, plus the power of the tablet when I want it. But something like that would reduce revenue for the phone companies, so I'm not holding my breath.