At this rate, the Switch will pass the SNES by Christmas. Probably the XBOne as well.

We should be getting updated shipments at the end of this month which would give us an idea on roughly how long it'll take the NS to hit the next mile stone the introduction of the portable variant in the NSL also providing a cheaper model should be an integral part in shipment numbers in future although for now it's just the hybrid model. This fiscal year will prove to be an interesting one with Pokemon in the third quarter and AC in the final quarter.

Shipment numbers should be this week also it seems 36m has been sold through to consumers so will update the op this would possibly mean shipments are at around 38m.

https://n4g.com/news/2281929/nintendo-switch-tops-an-estimated-36-million-units-sold-worldwide-to-consumers