Arfonious said:
Why does the FPS matter so much to people?
The eye can only see about 25 different pictures per second anyway.
That's not true. That's based entirely on tests that show that if you insert a single black frame into a video sequence, people can only percieve this consciously up to a framerate of about 30 fps. (1 black frame in 30)
But... That doesn't mean you have no awareness at all of the effects of higher framerates;
For that matter, in a game, the reaction speed of the game's controls are tied directly to the framerate. (so, the lower the framerate, the slower the game's inputs will respond - which is important in games with very fast action.)
You could also make an argument based on Nyquist sampling theorem. - This is a very commonly known thing in various forms of engineering, but basically, if you are trying to create a digital sample of an analog signal, it states that at the very minimum, you need to sample at twice the speed of the signal you're trying to capture. (and probably at 5-10 times that speed if you want to do it reliably.)
Applying that logic to vision, you'd quickly realise that to be able to clearly identify a single frame out of 30 reliably every time, your vision would actually have to be capturing information at 60 fps or more... Or perhaps even as much as 150-300 fps.
On top of all this, we're talking about the 3ds here...
And there is plenty of anecdotal evidence to show that when using a 3d effect, low framerates contribute quite heavily to the likelyhood of someone getting eyestrain, nausea, or other negative effects when the framerates are low.
So... No, saying it won't make a difference is missing quite a few subtleties that are related to things beyond the mere question of whether you can clearly identify each individual frame while looking at it...