It's an exceedingly light update on the 2013 MacBook Air. Apple has given the 2014 MacBook Air a small processor speed bump, from 1.3GHz to 1.4GHz, but the design, screen and basic features remain exactly the same. The only other technical improvement is a claimed 12 hours battery life,
The basic design of the MacBook Air hasn't changed for several years, but we're yet to see a rival conclusively beat it. It's a timeless piece of design.
Nothing illustrates this better than the large, glass-surface touchpad, which has spawned many (often poor imitators). It remains one of the best things about all Mac laptops, where its size, friction-free surface and neat gesture support make using the MacBook Air very enjoyable. The backlit keyboard, by comparison, is just quietly excellent. Usual Mac / Windows differences aside (don't ask where the '#' key is), it has a great layout and it's very nice to type on.
Connectivity is, as ever, basic, with two USB 3.0 ports joined by a DisplayPort / Thunderbolt 2.0 port and a memory card slot. It's just enough to get by and that's about it. Inside, meanwhile, you get Bluetooth 4.0 and 802.11ac Wi-Fi, which is as much as you can ask for and should keep you future proof for several years to come.