Just saw this news posted. So she'll be opposite Jonny Lee Miller in Elementary. Can we finally stop with the accusations that they're stealing from BBC Sherlock now?
There's more detail on her character (Joan Watson) here. So she's "a former surgeon who lost her license after a patient died, while consulting for the NYPD."
Okay, so she already has a non-romantic storyline presumably--a quest to get her license back--and like Margaret Colin's Jane Watson, she was already trying to solve crimes before Holmes came along. (Margaret Colin was a private detective; Liu's character consulted with the police.) That sounds promising. Let's hope the writing and the show lives up to this potential.
Don't know if they'll do a will-they/won't-they romance as well, but at least someone's thought about her character as more than just Holmes's sidekick. She has motivations of her own.