The "super tablets" that the article claims as the next step are what every nearly tablet before the iPad tried to be, and they universally fell on their face.
I don't see how a super tablet addresses any of that except perhaps cost. Ever drop a tablet? Have it fall into water? Ever see people using phones and tablets with shattered glass? I don't see them being less "breakable" than a PC, in fact much moreso because they are being moved around a lot more. They are also a lot more likely to be stolen, misplaced, or lost. And a tablet, especially one that runs MS Office, would not be any less of a target for malware than a PC, nor any more immune to it.
Yes, both in bath and in a stream. My Nexus 7 survived just fine, and didn't even shutdown.
By not needing to vent heat like most laptops, the tablet is actually pretty well isolated. It only had a few drops of water seep inside even after submerging completely.