I find it amusing so many people expect a revolution to happen every year.
Yes. To stay ahead of the game (in fact to even survive long-term), one needs a healthy dose of innovation.
Yes. Android phones came with many of the features/specs before the iPhone 4s that Apple is trying to sell now as "revolutionary".
However, look back to the original iPhone that launched just a few years ago, and compare with the new one. That's solid evolution for you, and that's how you keep your company afloat in most industries in real life.
The new iPhone 4S is a solid update. For those who currently own an iPhone 4, you probably don't need to upgrade. For those who have older phones, things look more compelling. I am currently leaning more towards Android, but I am sure I would not be disappointed should I still end up with an iPhone 4S.
Every now and then, you do need game changers that really shake things up. I'm a technophile, and welcome technological advances, but I'm inclined to believe the mobile phone industry is not necessarily one to need a game changer each and every year.