Tbh I've had a couple tablets and never used them much for anything. The niche between bigger than a phone but smaller than a laptop isn't one that I have many uses for.

But, assuming you use a tablet for something, I can definitely see the appeal of having a terminal on it. A lot of my time on ssh is spent occasionally checking on or configuring stuff, with lots of down time in between. So if you're reading on your tablet, it would be nice to quickly check whether your job completed or whatever.