The dark secret of computers? We don't need as much computer as we have.
Let's discount a few people here. Not to be mean, but in an attempt to demonstrate just how little computer a human being needs. First, we'll take out hardcore programmers. Obviously they're building the future, they need to be on the bleeding edge. Then we'll take out professional gamers. In their world, a tenth of a second lag could end a career, but if all you play is a balloon popping game? Eh, it's not so serious, is it? And finally, let's take out all the people who are trying to calculate the last digit of Pi. Good luck at that incidentally. So who's left?
The rest of us are left. Those of use who want to use this computer for movies and music and surfing the net. For the rest of us, this computer replaces the TV and the stereo and the phone. Seriously. In a world with no computers all those things would still be vital. But now? Hey, we don't need a $12,000 machine to socialize and be entertained.
So be honest with yourself about how much computer you need and what you plan to do with it. And if your answer is "interact with other people and maybe order pizzas" then yeah, this Chromebook is gonna be juuuuust fine.