Developer has been building smaller unit for a long time. Not a new thing here actually.
Between 2010-2013 there were even much smaller 2/3 bedders. Some can even fit in 2 balconies , 2 toilets & household shelter.
Here are the smallest condo unit in SG (according to unit type) I managed to find:
1 bedder, Freehold Suites @ Guillemard. 258sqft.
2 bedder , Freehold Qube Suites. 420sqft
2 bedder, Freehold Casa Cambio. 474sqft with 2 balconies & Household shelter.
3 bedder, Freehold Natura @ Hillview. 635sqft with 2 toilets & 2 balconies!