Well I'm comfortable enough with the aluminum, and after observing other liquid metal objects, I'm not sure I'd want a whole slate of that as my laptop.
Fair enough. It would be nice if they included an option for an aluminum unibody or liquid metal unibody. So people can chose what they want
Apple usually does things in small steps. first it was the SIM tray and I think soon it will be for iPhone enclosure and eventually future iPad 4G versions will use liquid metal.
If liquid metal is superior to aluminum, Apple is sure to use it. That's not how you treat a device worth several hundred dollars...