Nice to see Square Enix hasn't changed any. Their "Gameplay" Trailer for Final Fantasy XV is so typical for them.
*cinematic*
*guys running (technically gameplay)*
*cinematic*
*Shot of generic anime/Final Fantasy girl "Cid" who is nowhere near as visually interesting as her male counterparts*
*guys running (technically gameplay)*
*Cid again, boobs*
*cinematic*
*cinematic*
*guys sneaking past a behemoth (actually kind of awesome, also technically gameplay)*
*cinematic*
*cinematic*
*done*
So, if we are to take this trailer at face value and indicative of Final Fantasy XV's gameplay (which is what a gameplay trailer's for, I would remind you), we can assume there are no mechanics other than movement mechanics and no actual combat. Sounds exciting to me! I suppose after Final Fantasy XIII, we shouldn't be surprised that we, the player, are relegated to the role of simply moving the characters from one cut scene to the next.