There isn't a great story for dropping one more device - the phone. And that story is quite unlikely since you wouldn't want to carry your tablet with you on a night out, etc. I could see myself using this and dropping my phone if I never did things like out of band experiences. I'd eventually have enough situations per year where I wanted my phone, not my tablet, that I'd end up with a phone - but maybe I'd live with a 3-5 year old phone for that...
The wife would not like to see the tablet around 100% of the time since, with LTE, it'd be a physical extension more than PC's and the phone are now.
Well, sure, for a consumer device that I use on my couch in the evenings, I certainly don't need LTE. But the Pro seems pretty geared towards business, right? For business travelers this makes a huge, huge difference, though. And it seems to me that the high end Pro version is probably exclusively targeted at business users, at its price.
I've bought (and given away) four iPads with Verizon LTE. Exactly 0 people activated it.
This is old data, but in line with newer data I've seen WRT iPad activation rates: http://tabletquest.com/2011/02/disappointing-apple-ipad-3g-a...