The Romance genre has undergone a major transformation with the advent of e-books and mobile readers. The pool of authors has changed, and so have the readers. And with new readers and creators come new expectations.
One of the most interesting of these shifts has been in the roles, interests, and occupations of women characters. Specifically, the increase in characters who work in STEM fields (Science, Technology, Engineering, Math). These women provide readers -- especially young readers-- the chance to see women as having both brains and bodies, logic and emotion, rather than being constrained to only one at a time.
If you'd like to learn more about these kind of romance novels, this NPR article by Maya Rodale looks at three modern romances with female leads in the STEM fields, and is a great introduction.