This point may have been made by several posters already, but I think this conversation cuts to the heart of what we as a wine-drinking public will allow as "natural" manipulation. We have reached the point where we can alter things in wine on a more fundamental/molecular level, but as Joe Spellman indicated, this is really just a continuing progression of the same manipulations that have been building for hundreds of years (fortification, bubbly, chaptalization, etc.).
Whether or not modern manipulations have crossed that unseen line into the "unnatural" simply because we are able to look at wine now as a sum of component chemical parts is I think still up for debate. I would like to think there is a clear line at non-grape additions (such as chestnut tannin), but then again I might not think twice about beet sugar.
This being said, for me wines that are made in a sustainable fashion without much polish are usually going to give me a more pleasurable experience, and part of that experience is the peace of mind that is associated with similarly value-laden things: buying local, not shopping at wal mart, eating organic produce, etc. I would like to think that an adoption of new label language could clearly differentiate these wines from the more souped-up manipulations, but then again anyone who thinks that most "free range chicken" lives an idyllic life on the pasture has another thing coming.
In the end, as several posters said, it does come down to education. If we as a community can successfully correlate sustainably-made wines with less manipulation in winemaking to a more sustainable lifestyle ethic in general, I think that the differences in the wines will become more clear, and the subtlety of site and place will become more valued.