It might be superficial to you, but it's obviously not superficial to her. Knowing that there are people "like you" - whether the "like" is gender, ethnicity, hair color, height, whatever - and that they are successful can be very powerful for a young person.
I agree with this (and I like the Andre Leon Talley example) but I'd go even further and say that it's good for
everyone if the media can include previously underrepresented people in numerous and--especially--diverse ways.
This is why I think anti-assimilationist politics are so important. When I was younger, I felt pressure to act gay in the same way guys were gay on TV: fabulous, every girl's dream best friend, lover of diva vocalists, desexualized, etc. Even though we see more heterogeneous--and I use that word advisedly--representations of gay men in today's media, I still think there's a risk of creating a binary between the "safe" (perhaps most clearly exemplified by Neil Patrick Harris) and the "abnormal/dangerous" (like Johnny Weir).
ETA: I am not saying that Johnny Weir is either abnormal or dangerous, but instead criticizing the use of those terms to police identity. For example, I think Weir gets a lot of vitriol from both straight and queer people for being seen as "too gay," whereas I find that extremely problematic and would never say anyone is too gay, too straight, not gay enough, or not straight enough.
I wish we could transcend normal versus abnormal and safe versus dangerous and just accept that queer people can act like and do anything, but that entails defeating pressures to assimilate, which often come from within the queer community.
Moving back to the article, I think the author makes a closely related point really well. It would be pretty depressing to conclude something like, "We've moved all the way from viewing Asian-Americans as subversive Others who need to be monitored and possibly incarcerated to--70 years later--a wonderful society with three Asian-American A-list celebrities and a widespread belief that all Asians are book-smart and docile!"
So I guess my opinion is that visibility is an important first step, not only to inspire people who are also Asian (or queer or whatever) but to make everyone realize that people deserve to be treated ethically and as individuals rather than stereotypes regardless of their race, ethnicity, sexuality, gender, etc. If having multiple and diverse representations in the media can actually help go from invisibility to visibility to transcending stereotypes and binaries--and I think it can, but doesn't always have that effect--then the implications are far from superficial, and indeed related to the content of our characters pretty substantially.