Re: New op
Been thinking today about the exact questions you pose, since reading this article in the morning.
My wife has a Nexus 7. For her, its a mobile web browser. Anywhere she can get WiFi, she can hit up whatever websites she wants. If not, she uses her phone as a mobile hotpost.
I think she might start using it as a remote control for the cable box too, since the cable company offers it. Can't vouch for how well that will work out, but thats another story for another day.
What strikes me about her usage is that there really isn't anything that would make her say "Oh my tablet needs to be replaced because it doesn't do/have _____ like that new ones does!"
I suspect that she is not alone, that many others won't have a compelling reason to upgrade their tablets until they break. This leads me to believe that tablet replacement cycles are going to be quite different than smartphone replacement cycles, and much longer.
It may be that as most people that want a tablet (whether they knew they wanted one or not) finally have one, tablet sales may actually drop off quite a bit. I sure hope manufacturers aren't depending on continued market growth to fund the expenses of today. If they are, then tomorrow's tablets may be a *lot* more expensive than today's.