To have an idea of what to expect.
WiiU moved about 320k units in the US and Japan (with, believe it or not, Japan selling more than the US).
I'll take a wild guess and say that the rest of the word amout to about 120k, which would mean about 450k WiiUs sold to costumers in the last 3 months.
3DS hf moved about 640k within the US and Japan, can't really guess for the rest of the world.
I would, however, expect 3DS shipments to be rather low as I pressume there's still a large chunk of the Q4 shipments of New 3DSs out there.