In the Doit.im web interface, there is a lot of wasted space on the right of the screen. Some other task apps (e.g. Producteev) use this space for editing task detail, which is what I would like to see in Doit.im. That way, when editing a tasks detail, you can see it in the context of the other tasks, while having sufficient space to view the task details as well.

This will also align it with the iPad app layout.

I've attached a screenshot example from Producteev.