Why won't Samsung let us see its foldable phone?

Samsung may have just unveiled the most exciting new phone in years. Or, it may have unveiled a nearly $2,000 disappointment that just so happens to have a flexible display. 
We don't actually know, because the company barely let us see the phone that's supposed to herald a new era of smartphone design. Samsung kicked off its Unpacked event by cutting to the chase: it officially revealed the Galaxy Fold, a fold-up phone that doubles as a tablet.
It's an impressive feat of engineering, to be