You guys are worrying about something that could only happen if bitcoin was widely adopted, fearing that it would prevent its adoption by new users. You see how it is a non-issue ?
You're changing your tune, from
"It should not be worried about -- it's a non-issue because users would not notice if their clients were displaying nano-bitcoins",
to
"it should not be worried about
now, because it will not matter for a long time."
Well, if it will matter in a long time, then (1) it might be easier to address now, while bitcoin is young, (2) if it is not addressed, it could harm acceptance, as some savier people will not adapt something in the short term that doesn't have a long term path to success, and (3) you're still wrong that users would not notice whether their client displayed bitcoins or nano-bitcoins.