3G, 3GS, 4, 4S Makes sense - Apple's using an Intel-like tick/tock release approach. Coming out with a brand new industrial design every year is expensive, sin

3G, 3GS, 4, 4S Makes sense - Apple's using an Intel-like tick/tock release approach. Coming out with a brand new industrial design every year is expensive, since Apple opts for glass/aluminum nowadays rather than plastic.