I noticed that a Nintendo Zone app was installed along with the update. Too bad I can't really use it because there are no Nintendo Zone hotspots around here.
Nintendo 3DS camera now records videos. It records and stores video in widescreen, and I think you should be able to view it on anything that supports 3D video playback, and also anything as long as you remove the second video stream or something.
StreetPass Mii Plaza should be renamed to Mii Plaza now. Why? It's now SpotPass