I'm just waiting for a ruling or law that says digital purchases confer the same rights (of resale, of perpetual use without asking permission) as sales of physical media. Period. This is crucial for ebooks in particular.
Until then, we won't be able to declare this madness over and look back.
I don't know how you can solve that problem. The right of first sale works great when you have an item that, once sold, it guaranteed to be out of your possession. With digital media, it suddenly gets really murky: what does first sale mean if I can trivially hand you a copy?
As long as DRM is involved, you don't really own it, so we have to assume the removal of DRM as a pre-cursor to even being able to consider this question, but, once it's gone, thing thing your are selling is...what?
I don't foresee this being answered without a wholesale "information is free" society.
Until then, we won't be able to declare this madness over and look back.