Will it ever be "Clinton" rather than "Hillary"?

[Mister Mets]

There's also a tendency to refer to Jeb Bush as Jeb. It's a bit necessary to distinguish relatives of former Presidents from the former Presidents.

[Mister Mets]

I don't see it ever changing.

If Hillary runs in 2016, Bill will be one of her top surrogates so it'll still be necessary to use first names to clarify who said what.

If she wins, Bill would be expected to be a prominent first gentleman due to his former office, which could make for confusing headlines. A generation later she'll be one of two Former President Clintons.  We know that Bill was reasonably popular (reelected, high approval ratings) so it'll be tough for her to be the first Clinton people think of, even with the significance of the milestone of first female President.

Obviously if she doesn't run, or runs and loses, Bill Clinton will be the most prominent Clinton.

The second George Bush to be President was quickly the most important "President (George) Bush" and that was with a shorter difference between stints in office, but there are a few differences. HW was a one-termer and kept a low profile during his son's administration.

[Mister Mets]

If she wins, Bill would be expected to be a prominent first gentleman due to his former office, which could make for confusing headlines. A generation later she'll be one of two Former President Clintons.  We know that Bill was reasonably popular (reelected, high approval ratings) so it'll be tough for her to be the first Clinton people think of, even with the significance of the milestone of first female President.

Sure, but currently, many journalists for example refer to "President Obama".  If HRC becomes prez, surely they'll call her "President Clinton", no?

It's a bit different because Barack Obama is the only President with the last name Obama.

The Clintons are in an unusual place. Bill Clinton would likely be a notable figure in an HRC administration, and he was the only Democratic President for a twenty-eight year stretch from 1981-2008, so he'll be more significant than even the typical former Prez.