The new MacBook Pro retina screens look crazy good, but you need pretty stuff to look at on it, too. At the very very very least, that means nice-looking wallpaper. Here's what Apple's got loaded up in the Mountain Lion beta so far. There are 34 options in all, at 3200x2000 resolution, and you can grab them all in one zip file here. [Cult of Mac]
Somewhat related - are there any consumer stores in which one can see 4k? I'd love to see a 4k screen with actual 4k media, but don't have anything on which to view the few youtube videos that exist.
Beautiful hi-def images like this always make me sad because I have no means to fully appreciate them. Even most affordable (<— key word) monitors only come in 1080p tops.