My iPad mini fits my back pocket nicely and goes with me everywhere.
Although I am perfectly happy with my iPad mini 2, 32gb at this time, I am anxiously awaiting the release of the 4th gen. I was very disappointed with the 3 and it's lack of update (although I occasionally find myself holding down the start button waiting for an unlock because of my iPhone 6 lol)
I figure/hope the new iPad Mini will be a substantial upgrade this year and will buy a 64gb version with the money that I already had set aside for the upgrade last fall.
I don't know about getting rid of my current iPad Mini 2, as it is still a worthy device and runs iOS 9 just fine. I may just permanently mount it in my car and leave it there. Since I always buy the data version of any device, I can just get another sim from ATT for 10 bucks and add it to my data pool - or pull the sim from my iPad Air because it never leaves the house.
Anyway, yup, I'm upgrading.