The new Emoji 11.0 set is fixed and final, and includes the data needed for vendors to begin working on their emoji fonts and code ahead of the release of Unicode 11.0, scheduled for June 2018. The new emoji typically start showing up on mobile phones in August or September.
The man and woman emoji can now have various hair styles (red-haired, curly-haired, white-haired, and bald), and the new superhero and supervillain support genders and skin tones. The new leg and foot also support skin tones.
The version number for this release of Unicode emoji is jumping from the previously-released Emoji 5.0 to Emoji 11.0 (instead of 6.0) — starting with this release, the version number for emoji is synchronized with the corresponding version number of the Unicode Standard.