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Stratechery:

What is most important is ensuring that said developers have access to sustainable business models that justify building the sort of complicated apps that transform the iPad’s glass into something indispensable.
That simply isn’t the case on iOS. Note carefully the apps that succeed on the iPhone in particular: either the apps are ad-supported (including the social networks that dominate usage) or they are a specific type of game that utilizes in-app purchasing to sell consumables to a relatively small number of digital whales. Neither type of app is appreciably better on an iPad than on an iPhone; given the former’s inferior portability they are in fact worse.

Something that really concerns me, considering that my current career goals are roughly ‘independent app developer.’