Okay, this Bing Vision thing is really nice. Although augmented reality apps and one that scan are not new to the world (see Google Goggles), the way Microsoft does this on Bing is actually very elegant.
For one, we like how the overlay works when it finds what it's looking for. Just something really nice about the transparency and the items "floating" there. Second, the camera sensor works very well, even in low-light with little "re-adjustment" needed by the user. Barcodes read a bit better than CD cases or books, but even the latter should scan fine on a bookshelf in the store.
Finally, we also just like how it scans anything. You just point it at a CD, book or barcode and it just reads it. There's no settings, not select-format, it just works.