Even after you laid out your reasoning and your process, my first thought on finishing this article was: well, if you want a bigger screen, why not buy a laptop? XD
This is a clever solution to something that most of us have to deal with that don't want to carry around a laptop but want the functionality of a keyboard and mouse. I might invest in this so I can use Docs for school without hefting around my laptop. IT's a lot easier to pack a small bluetooth keyboard, mouse, and a magnifier than a full-sized laptop.
Love the Brazil reference. Nice to finally meet someone else who's seen it. :D
Some clever person could probably integrate the keyboard and magnifier into a single foldaway package as a cheap alternative to the Mirabook, Superbook, etc. With a place to attach the mouse for storage.