For me this isn't very useful.
There are two classes of devices that I can have. The small enough to be in my pocket all the time, and the too big to be in my pocket device that I use when I can.
This device could fit in my pocket--and I wouldn't mind it--but it doesn't have a phone. Something my pocket device needs. Heck if my Nexus 7 had a smaller bezel I could put it in my pocket.
Still, I like to see that Samsung is covering so many small niches.