I think so. the information boards initially stated: Erection of
a temporary bus interchange at Sembawang.
Soon after, the word "Temporary" was taken off all the boards. So,
i guess, it's going to be around for a long time until further
developments in this area take place. So, it's not a temporary
interchange, yet it's not going to be around for decades.
According to URA's Master Plan 2003, S'wang is supposed to have an
integrated bus interchange with the MRT station. This should be in
the distant future.
And I read that in the distant future, there will be a new MRT line
[North Shore line] serving the North, NorthEast & East. We can
already see the demand building up, judging from the many buses
between these areas: 39, 858, 969, 965, 161, 168.
Some said this MRT will start from S'wang, thru' Simpang [between
Yishun & S'wang] towards the East, yet some say it'll start
from Woodlands. If S'wang MRT turns into an MRT interchange, then I
think the current bus interchange will give way to a new bus
interchange to be built right beside the current S'wang MRT, with
the new North-Shore MRT station below it.
In any case, the proposed MRT line may even start from the
yet-to-be-built MRT station [NS 12]between S'wang [NS 11] &
Yishun [NS 13].