Minimum 32GB for the cheapest option (which is what I've always gotten), a much improved battery life (the 5.5 isn't an option for me as that is just WAY too big, not to mention too expensive for me) and more than 1GB of RAM for starters. And iOS 8 looks like the most minimal update to an iOS ever. Apple seemed to save the big updates for every other year and I planned my upgrades around it, but this year's big selling point was just "Shit is huge now.", which I don't want, and I wasn't impressed at all.