I think "wave goodbye" may just mean "We're going away for now, but someday we'll be back". I doubt we're going to see the last of Nine Inch Nails and/or Trent Reznor during this tour. Like the man himself said, he was thinking about making Nine Inch Nails disappear for a while, so that may be exactly what he's doing.
I suppose another possible answer could be this: Trent is going to take his music in another direction. Nine Inch Nails, for the past twenty years, has been fairly straightforward, even with the more "out there" albums (take your pick of whichever album you think is "out there"

. Perhaps Trent doesn't want to do what's expected of him and do something even more "out there". Maybe we've seen the last of the hard rock Nine Inch Nails, or the quiet Nine Inch Nails? Fact is, we won't know until Trent/Nine Inch Nails comes out with something, whatever it may be.
But yeah, I doubt this is
THE END. Who knows? Maybe this is only the half way point.
Edited 1 time(s). Last edit at 04/30/2009 11:09PM by BRoswell.