Is the reason that scalar context has been renamed item context to give it some symmetry with arrays/lists? So now we can have arrays associated with groupings (list context) and scalars associated with single objects (item context)? I was futzing around the synopses trying to answer this, and didn't come to a conclusion.
Looking through all of this, I'm sort of shocked at how much Perl 6 I've missed out on. These are very interesting reading, and I wasn't aware that design was this far along. (I've not followed Perl 6 at all)