I think it's faster than looking by the name, but you really should stop using the word "share". The 1-star review guy is a great example.<p>Sure, for anyone that understand the basics of computer programs it's obvious that you can't copy an app from your friend just by snapping a picture of the icon, but I don't think it's a good idea to rely on this assumption.
Neat, but I can't think of a single case in which I'd actually use it. In almost all cases the icons are displayed with text under them that show the name of the app.