I agree with Dave, that Jolla is currently only half way to the one hand experience.

I disagree about pulley menus - they are very one hand friendly (probably the best solution I have seen in the mobile world). The same with back/forward gesture.

The problem is that there are still lists of items to select, starting from the top of the screen. So when you need to select the first item, you are usually way out of your comfort zone. This usually happens when you open the last received email or any notification from the Events view, for that matter (!).

I cannot imagine how to fix this, though - the only way I see is to be able to pull the list items down so they don't start from the top (like it is done in BB10 menus), but it is impossible due to the presence of pulley menus.
Another way, but also quite complicated would be to introduce few items from the top of the list at its bottom (giving an impression of a infinite list), but it would mean that "push-up" menus would have to be removed.

What would make sense would be encouraging developers to dedicate top ~50% of the screen to non-interactive components (until scrolled), like images, information banners etc. Pretty much how it is done in the Friends application when you are viewing your profile.

EDIT: Now thinking of this ^^ it's not a bad idea. I'll try to implement it in the apps I'm currently developing.