FREE DOWNLOAD: Apple's 5k resolution Wallpaper
At Deviantart, user Ziggy19 has been kind enough to upload downloadable multi-res files of Apple's 5k wallpaper. It is hard to find a true high-res wallpaper and Apple has definitely released a great one to showcase their new 5k iMac.
Downloadable direct links:
You can also download the complete zip file of images (and show Ziggy19 some love - be sure to tell him itchban.com sent you) at Deviant Art