Full disclosure: I’m one of the primary authors and editors of the JSON-LD specification. I am also the chair of the group that created JSON-LD and have been an active participant in a number of Linked Data initiatives:RDFa (chair, author, editor), JSON-LD (chair, co-creator), Microdata (primary opponent), and Microformats (member, haudio and hvideo microformat editor). I’m biased, but also well informed.
Via Irina Radchenko