It all ended up pretty badly for Nokia, mostly due to suicidal management decisions first by sticking exclusively to Symbian well beyond its use by date, then by switching to Windows. Impossible to understand when they had a winner product in-house.
The Maemo era ended with the N9, outstanding software and hardware killed before it had a chance to succeed [1].
Jolla was a Maemo spinoff, but without the Nokia hardware expertise and financial muscle it was quite hard to succeed. Still, I hope they manage to put things together. I think the world needs a mobile platform with a better and more open userspace than what Android and iOS offer.
Other projects like Pyra [2] and Neo900 [3] are trying to accomplish the same.
[1] http://www.engadget.com/2011/10/22/nokia-n9-review/