Someone at Maemo.org has posted photos of what looks to be a prototype device similar to the N950, running Maemo 6 before Nokia moved to the Swipe UI of MeeGo Harmattan on the N9.
There are some photos and a short video also to see what could have been had Nokia stuck with Maemo developments. This would have most likely been the true successor to the Nokia N900.
Nice looking UI shown here and as you can see from the top of the screen it shows the 4 page scroller dots which were also seen in Maemo 5 running on the N900.
Here is the multitasking view shown and again this is almost identical to the multitasking layout on the N900 running maemo 5.
Like the N900, this prototype (RM-680) running Maemo 6 had a removable rear panel to make replacing/accessing the battery possible, a feature which was later dropped in the Nokia N9.
Here is a link to a very short youtube video showing the device in action:
The icons look really nice in this iteration (more similar to MeeGo squircles than Maemo icons) and the permanent dialler/messaging etc section at the bottom looks slick assuming it is also customisable.
I guess this just nicely illustrates the evolution point between Maemo 5 > MeeGo Harmattan and what could have been had Nokia stuck with Maemo.
I’m sure the Jolla guys would have been a part of the team working on this so it’s also a nice retrospective tribute to their hard work which unfortunately never saw the light of day, but did inevitably lead to the great Nokia N9.