If Apple can improve on the 10 hour battery life, then it will be successful.
Yeah, my 2011 model Air (11 inch) was the last one before Apple re-did the hardware and software to improve the battery life. I'm lucky if I can get 5 hours out of mine.
Plus the screen is really pixelated compared to even the newer non-retina screens. I had a hard time editing photos on it during Christmas because I could not tell if they were sharp on the screen!