An interesting thing happened today. Although we're only a few months into the iPad 4's product cycle, Apple introduced a 128GB model to the lineup this morning, which will be sold at $799 for the wifi-only model and $929 for the wifi+cellular model.
But the most interesting aspect of this isn't even the mid-cycle thing, it's the idea that Apple is pushing to reframe the iPad as a device for pros. Of course, plenty of professionals already own and use iPads for work, but Apple seems to be strongly suggesting that anyone currently using MacBooks for work should start thinking about making the switch to iPad, and soon.
And why not? A 128GB iPad combined with a keyboard case or similar accessory is certainly a compelling choice even compared to a MacBook Air. I'd wager that most people are perfectly capable of getting their work done on an iPad and have no real need for a laptop anymore. There are limitations within iOS that may keep true Power Users™ using their MacBooks even years from now, but these people are fringe cases and their numbers are ever-dwindling.
Not everyone uses nerdy stuff like Keyboard Maestro macros or TextExpander snippets or application launchers like Alfred/LaunchBar. Most people aren't writing AppleScripts to accomplish tasks. All they need is the right kind of app for a specific task, and iOS is a goldmine for things like that.
I expect the next few years to be pretty interesting, since Apple appears to be rapidly chipping away at Microsoft's iron grip on the work/productivity market.