It would have to be a combination of
1) Budget: iPad, front cover, back shell, Applecare = almost 900)
2) if the ability of the old iPad prevents me to run the latest iOS and Apps that I need
3) (very) outdated technology of the old iPad: retina is nice, but having it wasn't isn't a necessity at the moment
4) ICT needs coverage: buying a new iDevice that just will gather dust after the "it's new, lets use it" period has past because your other hardware is sufficient to cover all your needs
I'm still rocking my iPad 2 (iOS 6.1.3) and while the iPad 5 will probably cover my point 2 and 3 (iOS 7, retina, better processor, small form factor), I'm still not sure if I would buy it, because of my point 4.
When I went to work with the train and there was a pc (desktop) provided by the company, I used my iPad 2 to watch movies.
When I went to with the train, but I had to bring my own notebook (MBP), I watched movies on the MBP.
Now I'm going to work with my car, so I can't watch movies while I'm driving
and it makes no difference if the company provides a pc or not.
I'm using my iPad 2 nowadays when I have to teach (the course is also available in pdf), reading at home or watching movies when I'm travelling on plains, trains, but no automobiles.
All the other times my ICT needs are covered by the iPhone and the MBP.
The only thing that I steady upgrade are my iPhones and that's primairly because they are work tools for me in a market segment were the technology that you use has to be more to the cutting edge of what the market provides.
This is just my own need and doesn't reflect the need of others, but even there my upgrade speed is modest (every other year).
1) Budget: iPad, front cover, back shell, Applecare = almost 900)
2) if the ability of the old iPad prevents me to run the latest iOS and Apps that I need
3) (very) outdated technology of the old iPad: retina is nice, but having it wasn't isn't a necessity at the moment
4) ICT needs coverage: buying a new iDevice that just will gather dust after the "it's new, lets use it" period has past because your other hardware is sufficient to cover all your needs
I'm still rocking my iPad 2 (iOS 6.1.3) and while the iPad 5 will probably cover my point 2 and 3 (iOS 7, retina, better processor, small form factor), I'm still not sure if I would buy it, because of my point 4.
When I went to work with the train and there was a pc (desktop) provided by the company, I used my iPad 2 to watch movies.
When I went to with the train, but I had to bring my own notebook (MBP), I watched movies on the MBP.
Now I'm going to work with my car, so I can't watch movies while I'm driving
I'm using my iPad 2 nowadays when I have to teach (the course is also available in pdf), reading at home or watching movies when I'm travelling on plains, trains, but no automobiles.
All the other times my ICT needs are covered by the iPhone and the MBP.
The only thing that I steady upgrade are my iPhones and that's primairly because they are work tools for me in a market segment were the technology that you use has to be more to the cutting edge of what the market provides.
This is just my own need and doesn't reflect the need of others, but even there my upgrade speed is modest (every other year).