I really don't feel comfortable with this.
I felt kind of funny with my Aluminum MacBook. I know Apple has been a long-time user of aluminum, but it already acts as a sort of "Consumer abuse" signal. Apple doesn't have to honor your warranty if they find a dent, they can blame your problem on a drop or something.
Those water-sensors already suck. My cell phone has some in it, and upon visiting Maine during a 3in/day rain storm, the humidity made my hotel room damp, and triggered the sensor, so I'm not allowed to get a new battery on my 6 month old cell phone, with a battery life of about 3 hours standby.
These things do concern me, and I've just gone ahead and grabbed some safeware insurance as opposed to applecare. I love Apple's products, but I think they're overstepping their boundaries. I understand they want to save themselves money, but too much power can lead to abuse, and Apple may very well do that. What if my package was dropped during delivery? Warranty could be voided. What if my notebook slips out of my hand due to my disability, and falls safely a few inches onto my bed? Warranty voided. What if I cover the damn thing in bubble-wrap constantly when I'm not using it? Warranty could still be voided somehow I bet.