This is an old thread. Took a few minutes to read what has been previously posted and can think of a few more important "breakthroughs" that haven't been mentioned.
Seeing Kathy's pink with the vibrant orange throat made me think of the large green throats that have become the "in" thing. Doorakian's 2007 Rose F. Kennedy, both dip and the tet conversion appears to have put this in motion, but before that Tim Herrington was working on the large green throats as far back as 1998, Calypso Green, maybe sooner.
Variegated flowers have really taken off. The stripes, Derrow's Pink Stripes (2006) and Lovell's Peppermint Ice (2004) are two of the early striped ones I can think of.
Then there's Steve's Clown Pants (2015) with stripes on the sepals.
The broken color pattern...
Augie's Unique Beauty (Krupien 2007), Explosion in the Paint Factory (Howard 2013) and Undefinable (DeVito 2014)
Doctor Strangelove (Cochenour 2007) which seems to show several variations of this color pattern group.
Color changers, I don't grow any so I'm going to wing it.
Foar Bizar (Riggle 2001) may have been the first one. Pigment of Imagination (Norris 2008) was the cv that had the daylily world talking about this odd color pattern. I'm not sure if In a Jiffy (Salter EH 2012) showed color changing but it was used by Larry Grace for several of his color changer intro's.
I'm sure I missed some important breaks, additions/corrections anyone?
Let me think on the Sculpted, Larry.