During the first two weeks of Sep, I did hear the ISMs announcing for the passengers to close the window shades before they deplaned. Heard this on both CX and KA flights. I noticed that not too many passengers paid attention at all, and indeed, most of the shades remained open.
During the last half of Sep, I have taken another 4-5 flights, but I no longer heard the ISMs making the request to close the shades. Guess this request didn't work too well.