For the last year and change, Square Enix has been bringing Final Fantasy XII: The Zodiac Age to trade shows and conventions, and the demos are always a little strange. To be fair, the source material isn't the most demo-able, but these have always been weird demos, even by Final Fantasy standards.
You pick up the game somewhere, in the middle of a mission, and have free reign to wander as you wish. Eventually you'll run into am end of demo screen. After doing maybe 25% of a mission.
The gambit system and zodiac job system updates do make the game a bit smoother, and the updated graphics make it look just nice enough to not hurt your eyes, all of which is shown by the demos.
It just seems strange that we get such scattered missions to demo at shows.
Nevertheless, The Zodiac Age feels exactly like XII. And plays like it too.
Final Fantasy XII The Zodiac Age releases on PS4 as an HD Remaster on July 11th.