Plenty of people won't be bothered by GarageBand or iMovie, and will want just iPhoto—and they'll want to download it, too. If Apple does charge just $15 per iLife '11 app as this photo suggests, that's amazing news.
When you zoom into an image on Apple's website showing the Mac App Store on a MacBook Air, you can see plain as day that the iPhoto, iMovie and GarageBand apps for OS X will cost $15. Now, Apple hasn't confirmed they'll be sold separately—or that iLife '11 will even be downloadable from their new store—but doesn't it make sense? Particularly when they're such ambassadors of downloads over optical formats.