Nintendo Zone
Nintendo Zone is the successor to DS Download Stations, offering retailer exclusive content, game videos, screenshots, etc. It's not known yet whether this NZone has demos, the DS(i) nzone had DS demos. USA Best Buy and some other retailers have NZone, this NZone seems to be significantly different from the DS(i) NZone, this NZone seems to use a different server from the DS(i) NZone as well.
Like DSi, when an open 3DS detects NZone the hidden NZone title appears and a notification about it appears. Like DSi this title is already stored on NAND, it's just not visible until you're in range of NZone.
Description
Not much is known about this new 3DS Nintendo Zone. The NZone browser interface looks very similar to the main 3DS web browser, so it's probably the same as that browser except modified.(and with video support, presumably mobiclip)