Simply by adding these doohickiesdoohickies which stand 7' 10" tall and weigh 440lbsthe aircraft burns 3.5% less fuel and extends its flight range by another 100 nautical miles. In easy numbers, annual savings per aircraft with Sharklets comes in around 700 tons less CO2 released into the atmosphere. If you want to see some graphics on all this, check out the recent BlueTales blog.
Right now you're probably thinking that you've seen these dramatic wingtips somewhere else before, and you'd be right. They've been on certain Boeing aircraft for a while now, like the 767. Sharklets are just the Airbus version of Boeing Winglets, with an awesomer name. Other airlines sporting Sharklets include AirAsia, Avianca, Jetstar Japan, Lufthansa, IndiGo and, soon, Virgin America.
If nothing else, at least Sharklets provide an excellent excuse for another airplane maintenance time-lapse video:
[Photo: Airbus, Video: JetBlue]