Allow me to add some context - I live in these parts of SF, just a few blocks north of Union Square.
1 - This will be replacing the Levis flagship store, which is a large, drab, chunk of a store that provides no visual interest to this area. This location is a great choice. It will be at the 'top' of Union Square, from a visual standpoint and will really give the corner some personality.
2 - The Asawa fountain is a brown blob that nobody gives a second thought. It doesn't strike one as 'art' in this context and there are several other Asawa examples like it in the city. There's lots of stuff to see around Union Square, this fountain isn't one of them unless you're an Urban Design Critic.
3 - Heat-wise, this glass facade construction isn't an issue in SF. This city doesn't get hot.
4 - The Stockton Apple Store is really small for its foot traffic. This is long overdue.
Anything, and I mean ANYTHING, that's done in SF to alter existing buildings, parks, thoroughfares, bike-lanes, dog-runs, etc is subject to bellyaching. There's a whole subset of SF dwellers who believe that the city is some kind of living museum and anything done to change the appearance, complexion or demographics therein is heresy.
San Fran is the capitol of whining. I am not surprised by this development.
For real.