Apart from the run away success of Apple iPad, the other product that defined 2010 was the new Mac Book Air.

Watch Apple's official video. (Youtube Link, 20.5MB at 360p)

Starting at $999, these are not exactly cheap, but noteworthy for following reasons
  1. Sleek yet sturdy Unibody construction 
  2. 8.5Watts power usage vs. 13-45W typical (iPad is ~3Watts)
  3. 2.9 pounds. My current Dell weighs 7 pounds.
  4. All Flash storage
One key element lacking is Sandy Bridge (Core i5 2537M). MBA 2011 should close that gap.