What about the idea of Nokia turning into a more hardware centric company?
I bet in the future we could upgrade our devices (I wonder if they'd be called 'phones' at all) just like we upgrade our PCs today - e.g add/remove hardware to/from it.
So how about Nokia going to that direction by shipping fully opened devices, stocked with MeeGo/Symbian, but with the possibility to install WP7/Android/Whatever on it, effectively making Nokia a hardware vendor?
Of course some adaptations would be needed, but maybe they could provide some quick means for that...

Just a thought