I like small knives. 2" of edge is enough for almost all tasks I need a knife for, and they're convenient to carry at all times.
I can understand keychain knives, they work in a pinch if you forget to toss a more substantial knife in your pocket. I have a SAK classic on my keys, I don't use it much but there's no real downside.
This seems less convenient than a SAK classic with no benefit. This takes longer to get open, it takes longer to close, it involves the important bit being completely detached and easy to drop, it seems less comfortable to use, and it seems less useful overall (no tweezers, toothpick, or scissors). And are we meant to sharpen it when it gets dull? Not sure how that would go. It looks cooler I guess, and novelty has a value for the overall design, and if I didn't have a keychain knife already I might consider it, but since I do have the SAK classic this isn't very interesting to me.
Also, "the smallest blade ever made?" Isn't it...obviously not?