There's no Lion USB stick in the 2011 MBA box (unlike the Snow Leopard USB stick that came with the 2010s).
There reads to be a recovery partition resident on the drive, so you restart the machine while holding some keys to launch the OS X Utilities application that will reinstall the OS for you. Plus, it requires an internet connection so it probably fetches all the appropriate software.
Update, mods I just saw the front page article, so feel free to delete/merge this thread
https://www.macrumors.com/2011/07/2...-new-macs-install-os-x-from-blank-hard-drive/
There reads to be a recovery partition resident on the drive, so you restart the machine while holding some keys to launch the OS X Utilities application that will reinstall the OS for you. Plus, it requires an internet connection so it probably fetches all the appropriate software.
Update, mods I just saw the front page article, so feel free to delete/merge this thread
https://www.macrumors.com/2011/07/2...-new-macs-install-os-x-from-blank-hard-drive/