Macbook Air. I've been really happy with my decision to go with the Air over the Macbook Pro. The latest line is definitely powerful enough to be a primary computer for users who don't need more processing power than you'd need to play or stream video smoothly.
Not quite a new product, but definitely one of my favorites. I'm using a MacBook Air as my main computer since november, and I'm completely in love with it. I work as a web developer, and the Unix platform, together with an awesome OS, really makes me happy.