I remember watching these, huddled around my old tank of a computer, still chugging along on Windows 98 and dial-up internet. The event was Square Millenium, back in January of 2000. A series of consecutive trailers was shown; first was gameplay from Final Fantasy IX which was released several months later in July.
The second, with bated breath, was the announcement of Final Fantasy X in junction with PlayOnline. The first Final Fantasy in the next generation! My mouth was agape as I saw the black-haired character that would evolve into Tidus jaunt across the screen in full and smooth 3-D. Swinging the camera around in all directions proved that pre-rendered backgrounds were all but a distant memory. (Although, the final version didn't give you camera control and it did have pre-rendered backgrounds in some instances.)
After that, after Final Fantasy X had left me in a stupor, another trailer started. This, of course, was the debut announcement of Final Fantasy XI. As the trailer played, I had no concept at that time of what the game would be or become. When the words "online another world" appeared on the screen, it was clear.
The trailers keep on coming today folks; here's the debut of A Moogle Kupo d'Etat: Evil In Small Doses as part of the newest trifecta of expansions for Final Fantasy XI!
The first gameplay trailer of Four Warriors of Light: Final Fantasy Gaiden has arrived. The new style is definetly intriguing, and I'm already anxious to see more battle footage; overall this will be a fun one to explore.