Nothing ended up happening. It actually fell off of surfaces several more times (never more than a couple of feet).
Everything's been totally fine with it. Zero problems whatsoever.
Honestly the only issue I ran into was when I upgraded to Mavericks, there were some software-related issues; I had to repair disk permissions (and found that a ton of people had to do this, so it wasn't related to anything physical) and fix some dev tools. I waited until .3 to do it. So far, so good with the new OS.
But yeah, overall it's a pretty solidly built machine. I'm not sure whether they're still as solid as not; but this particular model is stellar. I really liked that they offered the high-res screen for a while, before the retina display was even a term; it's a great screen.
I think having SSD helps with stability. Also, Macbooks inherently have fall detection built-in... So if it knows it's in a fall, it will stop writing/reading to the disk to avoid any corrupted data and/or damage. Seems to be tested and working!
Just be careful with those slick leather couches! They're slippery 🙂