This is spot on. All-in-one devices inevitably have to make compromises on features, price, quality, or battery life, which make them less good at any particula

This is spot on. All-in-one devices inevitably have to make compromises on features, price, quality, or battery life, which make them less good at any particular thing. This is also why I think Paul Graham is overestimating how much special-purpose devices will be replaced by tablets. People who actually care about photography won't be happy with a cellphone camera. Book readers probably won't. Mobile game consoles might, but it's not a given. Apple still sold 7.5 million iPods in Q3 2011.