Tweaks I'd like to see . . .

You could make a case that we have all the audio gizmos we could ever need (and then some).

Still, I just KNOW there will more coming down the pike, so what are the five most urgently needed tweaks?

Here are mine:

Audiophile air conditioner, makes sure your air has exactly the right mixture of nitrogen, oxygen, humidity for the barometric pressure to ensure highly accurate sound propagation.

Audiophile sweater and hat. Did you know that the earliest reflections are from your own clothing? After spending terabucks on your room and equipment, do you want to smear the sound reaching your ears with poorly designed clothing?

Garmin Audiophile map service. Routes traffic away from your neighborhood during peak listening hours, giving you blacker blacks and greater dynamic range.

Audiophile grade carpeting. The biggest reflecting surface in your room is currently producing zero dollars of revenue for the high end industry, and this must STOP!!

Audiophile communities. New developments of homes/condos with strict construction standards, room dimensions and zoning regulations. Additional safeguards include strict limits on when lawnmowers, chain saws and motorcycles may be operated. Every outlet in every room gets it's own shielded 30 amp OHNO copper circuit.
Anti-static socks with "star grounding" to the entire system. Allowing you to be as one with your system. Elimnating ang static or ground related issues. Of course including the optional matching gloves that doubles as a record cleaning brush.
Pocket nuclear reactor with matching battery power supply to supply all the power my system needs off the grid for blacker blacks, tuneful treble, a magnificent midrange, dimensional depth, sensational soundstage, and bodacious bass!
Or for you Foundation (Asimov's that is) fans, how about a nuclear plant built into each component!
How about a vacation rental cabin?
Built underground with five foot concrete all around, impeccable room treatment and purified A/C.
I'd say 50 X 50 feet with 20 foot ceilings?
Just specify what components should be waiting when you arrive.
An audiophile injection (Also in tablet form for those with more time) with just the right combination of vitamins/enhancements to put your body in the correct state to absorb the beautiful sonics.

Audiophile nanny service who knows just the right time to calm the kids down and take them away so there are no distractions during prime time listening.

Audiophile censor to make sure the recordings and music is good enough to warrant all the above.

Audiophile electricity company who put only the finest metals,shielding and damping products into their mains cable from the power station straight to your outlets. All 30 amp, and all solar powered from huge batteries. Clean, fast and tested to give the perfect sine wave. Also special wave forms for digital set ups also available.
Hmmm . . . solar/battery power supply? This might actually work, and could be a TRUE dedicated circuit, not even connected to the grid.

To take full advantage, you'd need an Audio grade Power Boot Camp. Similar to a power conditioner, but this would take it a step further, training the electronics so they are ready, willing and able to be amplified.

The high end models would naturally come in specific models for class A, AB and D amplifiers, as well as for digital components and video. These would have Special Forces level training circuits to fully prepare the electrons for their mission. They would use a combination of Quantum and Popular Mechanics to identify and separate potentially noisy/uncooperative electrons. These would be sent to the GITMO circuit, where advanced nanosecond feedback methods are used to either get marching in lockstep or else . . .

Of course, these essential audio devices would give insanely black blacks, but do NOT hook up two of these in series, or you risk creating a black hole, which would adversely affect your listening experience and more importantly.

A black hole in your vicinity would really be a problem and should be avoided at all costs. But I wonder if PRAT would be much better? It could be a useful side effect.

It may be difficult to see if the equipment is still on as the LEDs would suffer the doppler effect as red shift sets in. You may get inky black backgrounds though.
Ncarv I agree an audiophile woman I think is the ultimate tweak for me. My girlfriend thinks that her grandmas 20 year old akai midi system with turntable sounds just as good as my current system. My audio related disposable income would increase about 10 fold.

Subwoofer with built in bong, firing huge smoke rings at your head with every thump.
I would love to see a break-in CD for new room treatments. It takes so long before they start to sound good otherwise.
How about audiophile floor joists? They could damp floor resonances, and power-condition any Romex routed through them?

Speaking of Romex, I don't think anyone is marketing audiophile Romex, but I'm probably wrong . . .

I'm thinking solid silver 10 gauge Romex, routed through OHNO copper conduit with RF-absorbing liner. Yup, should do the trick.
New kinds of music and those who can perform it. What we have now is all the same more or less.