Just been to the Esplanade for a concert yesterday and realized something -- that there are no longer signboards prohibiting photography/videography.
Installation artwork is still there, and people are happily snapping away. Security is there, but they did nothing. Photography appears to be allowed at the rooftop terrace now as well, even saw people with tripods.
Only place with a "No Camera" sign is the Jendela exhibition hall, and the performance venues like the Concert Hall/Theatre, etc.
Hope it continues this way.