@Fargus: You mean other phones don't need batteries?
The cost of ownership isn't just the price you pay to acquire the device, and to maintain it (battery, parts changes, accesories, etc) but you have to remember that you can also offset part of the cost when/if you decide to sell it off one day. On this point I think the iPhone wins, because they hold up their prices rather well.

As for '60p a day for a game': do they really buy one game per day?

I also think the general feedback is that iPhone games are lower priced than its competitors in the market (of same quality). IE: rhythm games cost $0.99 to $9.99 on iPhone while similar titles go for $20-30+ on Nintendo DS.