Why you should buy the iPhone 5 and not upgrade next year

Since the iPhone 3GS, I've upgraded every year. iPhone 4 was a huge, worthwhile upgrade, but iPhone 4S was...meh. I've decided to go all out with iPhone 5. 64 GB with Apple Care+, $500, but plan on using it for two years. I'd rather be on this two year cycle then the S two year cycle.