Face unlock, making security fun!

I was thinking about the article that Android Central posted yesterday about Google Wallet having a pretty basic loophole in the security.  I don't actually use a pattern or code to lock my phone because I just try to keep a close eye on my phone.  I even hold onto it while it's in my pocket sometimes.  But face unlocking would make it fun!  From what I read, it's not something that people use daily, but definitely something that's very amusing to use.  I would probably definitely use it to show off to people, but also whenever I do find a big need to lock my phone like when on vacation.  I do understand that most Galaxy Nexus' doesn't have Google Wallet, just got me thinking.  Thinking about how awesome the phone is, that is.