The iPad Air features a thinner design than its predecessor. Dropping almost a quarter of the volume of the previous generation iPad, the iPad Air is just 0.29" (7.5 mm) thin and weighs just 1.05 pounds. Overall, the iPad Air is 28% lighter, 20% thinner and 24% less volume than the previous iPad.
The 64-bit architecture allows for more robust and powerful apps. Utilizing the A7 chip, the iPad Air runs apps faster and more efficiently than its predecessor.