The increase in sample rate to 192kHz only allows frequencies above 22KHz to be represented (i.e. no effect whatsoever on the low frequencies that you mention). Pushing the bits to 24 only lowers the noise levels (which at 16 are already demonstrably imperceptible).
What you mention, though, points directly to what /will/ improve the quality of sound reproduction: speakers. It gets harder and harder to move that much air with precision as you get lower and lower in frequency. It's a definite technical limitation, but it's to do with very high-power amps and giant speakers, not the recording format.
We have (to the degree that humans can prove that they can perceive), perfect reproduction from digital recordings, perfect amplifiers for reasonable prices (at lower-than-concert-power-levels at least), but we haven't yet developed good enough speakers to cover the whole perceptible range of frequencies to anywhere near the same degree.
Audiophiles love to try and improve the whole chain, but really the only place it matters is at the very end.
According to this interesting-looking article here http://www.theregister.co.uk/2014/07/02/feature_the_future_l... the problem isn't frequency response but things like time delay, and it's not due simply to the very end but also to systems leading up to and around it like inaccurate crossovers and speaker cabinets that introduce time delay.
What you mention, though, points directly to what /will/ improve the quality of sound reproduction: speakers. It gets harder and harder to move that much air with precision as you get lower and lower in frequency. It's a definite technical limitation, but it's to do with very high-power amps and giant speakers, not the recording format.
We have (to the degree that humans can prove that they can perceive), perfect reproduction from digital recordings, perfect amplifiers for reasonable prices (at lower-than-concert-power-levels at least), but we haven't yet developed good enough speakers to cover the whole perceptible range of frequencies to anywhere near the same degree.
Audiophiles love to try and improve the whole chain, but really the only place it matters is at the very end.