It's a very person to person thing. I carry both a smartphone and a tablet with me everywhere and I find myself never using the phone unless someone actually....phones.

Depends on your definition of "everywhere". I don't even walk the dog without throwing my phone in my pocket first. Would you always walk your dog with your iPad?

That's a good point, although in fairness I actually have walked my dog with my iPad, I was reading the Economist. However to the point, it requires a 'different' holding. It certainly isn't something you put in a pocket but if you tend to carry a bag around it's light enough to throw in there, around the house generally the tablet is 'near by' but my phone is always on my person.

It will be an interesting evolution.