I was seriously going to upgrade my iPad Mini to an Air 2 this year, because my A5 equipped Mini is now ridiculously slow at some tasks. The amount of website reloads compared my 6+ is actually quite bad. The screen quality or size just isn't right for me anymore. It was when I brought it, but needs and wants change.
I'm not going to now though, even though I have brought an Air 2 for my girlfriend for Christmas.
All the talk of the possible 12.2 inch iPad has made me want to wait. An iPad at that size with the right apps could in theory replace my need for a computer running OSX. My needs are nowhere near as heavy as they used to be.