It seems like the technology is out there from at least a handful of companies. I'm not trying to re-invent the wheel, but I have had some ideas on the subject over the years.
ntsqd mentioned that having less failure points was a good thing. To me, it seems like the sealing element for the air that allows rotation is the most fragile part of the system. ARB has been able to get around this over the years, but there rotary air seal is in gear oil all the time, and unless installed perfectly you get leakage.
I'm conflicted about the idea. On the one hand I like simple vehicles that are very reliable...kinda of a Tom Sheppard approach. On the other hand, I see the need for a product that fills a void. I know of a lot of people that either don't air down because of the hassle, or don't air up when they should because of the hassle. Both end up loosing in the end because you either break more parts not being aired down properly and generally get stuck much more often or you don't air up soon enough and risk tire damage, blowouts, etc.
For me, when I am in a 'hardcore' expedition/exploration/4wheeling setting I have had times that I generally have to air up and down a few times a day. Once is fine, but when you cover a lot of hard technical ground, I find that I have to go from highway pressure, to trail pressure, to snow pressure, than back to trail pressure, than back to snow pressure, etc.
Some of my bigger journeys with friends tend to combine multiple 'wheeling adventures into a single day.
In the end its only time and comfort that prevent me from changing air pressure. There is a part of me that thinks it would be really nice to be able to push a button on the dash to disconnect the sway bar and push another button to air down the tires. You would be ready to go exploring without having to get out of your nice clothes
