Somebody on the internet translated the menus of the FFXV demo showcased on that stream, so we can have a better understanding of the weapons and abilities and whatnot. I'll post some of the images here, then you go to the source to check the rest and the gifs.
This one because it has a Jump, which is always awesome.
Anyway. the rest of the screenshots and the gifs are on this site: http://www.dualshockers.com/2015/02/22/final-fantasy-xv-translated-screenshots-and-animated-gif-show-noctis-weapons-and-his-attacks/
Also, here's an estimate of the size of the demo's map, and a sort of educated guess of the size of the full game's map (thanks HollyGamer): http://www.dualshockers.com/2015/02/21/final-fantasy-xvs-episode-duscaes-map-size-1-16-square-miles-8-of-skyrims-map-size/
Essay Pro