I have a tablet I use at work solely for teleprompting. We also have a tablet at home that my wife uses. I've always held the opinion (though not strongly) that tablets are not an ideal size. They're too big to carry with you all the time so you inevitably set it down. I'm never in a situation where I slap my forehead and say, "I should have brought my phone!" but I'm sure it would happen with the tablet.
Likewise, when I want to do heavier work, it almost always needs applications that just aren't there (or not all there) for the tablet. I go to my desktop (or laptop when traveling).
So, for me, the tablet isn't all that useful and I consequently hardly use it.