Yep, bare concrete looks surprisingly good when combined with some fresh glass. It's astonishing and daring like some contemporary tribute to the 60's brutalist façades that so many yet dislike. In this case, though, glass widely takes over. I can think of an example in Maisons-Laffitte, a Parisian suburb with large sections of bare concrete walls shown off by the façade. Too bad I can't get any better picture than this:
http://www.fym.es/ENG/Our+Products/T..._TXGallery.htm
Glass to that thing is slightly tinted and the overall thing looks good, at least as long as the façade is clean but I think it will age quite well.
I expect this tower to be spectacular. It's the best high-rise residential design seen on here IMO.