She's amazing! What a performance
Yuja Wang is very strong in Russian repertoire (and Ravel); she excels at bringing out contrapuntal voices and interior melodic lines in any of the works she plays. Some of her Beethoven can seem a little perfunctory to me, but not always. She is often mentioned when talk turns to potential successors to Martha Argerich, assuming she doesn't burn out. She's past the usual point where young keyboard artists do sometimes just flame out from overexposure and stress of touring too much too soon while still trying to expand repertoire. Wang's interpretive skills strike me as having been quite as well attended to as her physical command of the piano. I think her time w/ Graffman in Philadelphia has made her Scriabin performances things of wonder.
Wang has a sense of humor too, made a video once where she takes a break from keyboard practice, wanders over to a drum kit and has at it for a few minutes, also sampling some nonstandard percussion instruments and a fiddle... plus treating us to a few bars of piano played while draped over the piano bench on her back with hands stretched over head and turned to strike the keys. Argerich is also known for having quite a sense of humor... but I doubt she has ever let that much of it hang out on video short of a few bits in a docu one of her daughters made.
Then there are Wang's trademark and in some quarters controversially sexy clothes... but that's pretty much a generational thing and some of Wang's contemporaries also seem to wear whatever they like, regardless of pans or praise from critics and audiences. Clothes don't make the pianist and there's no hiding Wang's abilities at the keyboard. She's a lot like Argerich in her performance style: there's just the piano and the music and visual connections to the conductor at key moments of orchestral works. If you're in the audience then good for you but you're not on her mind while she's playing. Argerich has been known to say she feels lonely on stage at least as a soloist, and would rather perform for friends, but I'd say Wang diverges from Argerich on that point, even if she too is playing "for the composer alone" in performance.
And regarding Argerich: Wang's career actually got a huge boost when she stepped in for Martha Argerich in 2007 on short notice for four concerts w/ the Boston Symphony Orchestra, her debut w/ them and performing a substitution of the Tchaikovsky First Piano Concerto for the Beethoven Argerich had been scheduled to play. The conductor was Charles Dutoit, an ex-husband of Martha Argerich and someone with whom Argerich continues to perform and record from time to time. Never been clear to me if Ms. A had a hand in that substitution, although she has nurtured a lot of young musicians via her Lugano festival.
Here is a brief video of the then 20-yo Yuja Wang and Charles Dutoit rehearsing in advance of the 2007 Boston concerts.