Well you also have to take into account some n770, n800, and n810 owners are not happy with the direction Nokia seems to be taking right now.

1) Smaller screen
2) removal of USB OTG (ok not everyone)
3) cell phone radio in device (it does increase the cost of the device).

So not everyone is moving on, some moved to other devices while others are waiting for Nokia's next Maemo device to see if it will be closer to what they expect from the older tablets.