First, albeit a sometimes foreign concept in Apple-land, theres a thing called choice. Being able to use face unlock isn't the same as having to use face unlock.
Second, i doubt anyone is suggesting that the phone should be in constant-face recon mode. If you're logged in, you're logged in - even if your wife happens to take a look at the screen for a sec or two.
Third, you shouldn't a) drive at unreasonable speeds, and b) text or switch music while doing so. And, as for your paranoia, how do you know they haven't secretly implemented seeing displays already? Better duct tape your entire display, amigo.
That said, i think you're overcomplicating things. The idea is to make for a better multi-user experience by having your device know who you are instead of you having to tell it. Is it perfect? No. However, it doesn't have to be.
Now, are there adequate ways of achieving the same thing? Most definitely. After all, the problem itself is quite old.
A few questions:
Where is Apple land and how can I get there? Are the surfaces lickable?
I love choice. Saying that a particular choice is slow doesn't mean I don't have an intimate and sometimes financially irresponsible relationship with choice. I'm
extremely discerning about my choices. I love how you criticize my choice to go interstate speeds through school zones while texting but then say that because I find something to be a stupid feature and I must live in
APPLE LAND where we don't have choice!
I wasn't actually considering the situation you described with my wife, but it's an interesting problem as well. I was more thinking of the very common situation of asking my wife to reply to an email for me while I'm driving. She won't be able to unlock my phone unless she holds the phone in front of my face, thus causing us to crash into the school bus rather than my typical Tokyo Drift power slide around the bus eliciting cheers from the passengers. However, I think in your situation means if she does unlock my phone with her face, and it's set up for multi user, she won't even see my email. The plot thickens.
Also, HOW DO YOU KNOW I DON'T COVER MY CAMERAS?
ARE YOU WATCHING ME???
All kidding aside, I'm just trying to bring up my complaints with (get ready for this Droid fans) the best face unlock I've seen to date, the one on the Galaxy Nexus, as a way to explain my concerns with Apple trying the same thing. However, in the past they have taken other things that I didn't think worked very well and made them work better. Here's some issues they can address to give me the
choice I want to spend my money on. They are historically very good at this.
I don't think I'm overcomplicating anything since all of the situations I mentioned, that weren't jokes, happened to me today... several times. I have unlocked my phone at least 100 times today and I'm sure I saved at least a second per time that I did it versus face unlock. A probable minute of my life is spared.
Here's a recent review of the Galaxy Nexus where a guy goes on for three paragraphs about the distance from the 'screen wake up' button to the screen area for the slide to unlock.
"Believe it or not (I bet you believe it), the Lock button and the slide-to-unlock tap target are too far apart from one another. This drove me nuts!
The phone is literally too big to easily and comfortably unlock with one hand. Its so big, that to hold it in one hand where I can comfortably press the lock/unlock button I am holding the phone in the middle. But in that grip I cannot comfortably reach the slide to unlock slide. And so I would have to shimmy my hand down the phone to be able to reach the slide-to-unlock tap target. Or, I have to use the phone with two hands. It would be better if the slide to unlock icon were sitting right underneath the time/date on the Lock screen.
I unlock my iPhone dozens if not hundreds of times per day. Its a muscle memory at this point and it is a piece of cake. Due to the size of the Galaxy Nexus and the placement of its Lock button, I dont feel that I have a good solid grip on the phone when holding it in such a way that I can press the hardware lock button and also reach the slide-to-unlock tap target."
Back to kidding, I found this image when I searched for Apple Land. It looks fun. I would chose to go there, therefore I don't like choice. (i'm so confused)