Which part?

The part where Jolla isn't really trying to be Yesteryear's Nokia.
Where they are trying to build their own OS, device and ecosystem... not Nokia's.

The part where I'm going with this is that if Nokita is going to join the mobile market space, they shouldn't go with Windows Phone or Android. Blackberry, WebOS is out of the question (pretty much). FirefoxOS isn't really the best choice.

So what's the alternative?
A new ecosystem. The best way to go forward is to make a fork off Android, or make a fork off desktop linux.