For the fun of it:

Nokia released Maemo5 and promised a lot (4 out of 5)

Then they abandoned it and started wokring on MeeGo, promising even more.

Now they have abandoned that too and they are switching to windows promising again a lot.

1) Do you see the pattern ?
2) Perhaps the MeeGo/Harmattan/N950 comes out and noone promises anything at all and it becomes a success.

And there is some reasoning behind that: Nokia won't allow a product to mature. They constantly try to change it. Perhaps a product that is not their flagship will find the time to mature. Just like Maemo < 5 did.