Originally Posted by Aquinus
So I take it that you find Blu-Ray video "laggy and jittery" as well because it's capped at either 24p, 25p, 23.976p, or 29.97i and will never exceed 30 FPS (Sans 29.97i but even that might jump because you have to deinterlace the video).
I think that what people think of as "jittery and laggy" is actually the render time from frame to frame. Just because you're running at 30 FPS doesn't mean that every frame is rendered in the same amount of time. So if you render 30 frames in 1 second but the first 25 get rendered in the first half three quarters of a second, and the last 5 takes that last quarter of a second, you have changes in frame-rate that causes the jittery-ness you describe and you have the reduced framerate for that quarter of a second that introduces lag (and if it reoccurs often, it introduces more jitter).
So all in all, the frame-rate argument is dumb. The only reason 60FPS and 120FPS feels "smoother" is because that difference in render time from frame to frame that that much less. So I'm willing to bet that a 30 FPS game with equal render times from frame to frame versus 60 FPS that doesn't, the 30 FPS has the potential to feel smoother if not just as smooth because the instantaneous frame rate would be consistant.
The most important thing to take away from this is:
Average frame rate is not the same thing as instantaneous frame rates and variation between frame render times. Also keep in mind that it will be hard to make it perfect, as scene's change the render time can change as well.
Again, don't compare a movie with a game, the frame rates are "packed" waaaay different, Earth to Moon different. Besides, I believe we all want that virtual image, that virtual experience to be more life like, no? That also needs a high frame rate, just in the same way, a movie is more true to life close to 60 rather than 24.
Plus, a higher frame rate gives better control over your avatar.