When Apple announced the iPhone 4S, the company certainly talked up the improvements made to the smartphone's integrated camera hardware. With 8 megapixels of resolution, a redesigned lens, and enhancements to its software, it certainly meets or exceeds the needs of most casual shooters.
Still, we here at Ars have received plenty of questions to the effect of, "can the iPhone 4S replace a 'real' camera?" That's actually a hard question to answer, because individual needs vary widely. Would a professional photographer replace her trusty DSLR with an iPhone 4S? No. But, might a casual snap shooter replace a pocket camera with an iPhone 4S? It's pretty likely.