Those pictures and posters have been used by the HDB for quite some time already.
If you travel along Bartley Road there are two major HDB BTO construction projects ongoing now: Woodleigh Hillside and Woodleigh Glen. On the fence wall of the construction site you can see a new picture: a man showing up at the doorstep of a woman, surprising her with a bouquet of flowers. Something about BTO surprising you with value for your budget etc.