I completely agree. Almost all my photographs are about the value they will have in the future, not about now. My whole philosophy about it is looking at photographs as a way to stop time. For 125 of a second on such and such a day, in such and such a year, this is what this person looked like. They will never be the same again, and here it is. That is why I shoot now exclusively in black and white. It's timeless and priceless. And the older it gets the more intrinsic value it will have.
That to me is what it is all about.