[sethg]

It would be perfectly logical for Nokia to have an alternative OS waiting in the wings, in case Windows stops being useful for them, or even as an incentive to discourage Microsoft from squeezing them too hard.

Of course, once upon a time, (Linux-based) Maemo/Meego was the OS waiting in the wings, which they were going to migrate to after Symbian stopped being useful to them, and look how well that worked out.