I actually like the landscape format for hand holding (better than the Pioneer format), so I am not sure yet what the DM41X would bring me, apart from looking gorgeous, and enabling ROMs I am probably never going to use anyway.
What might convince me would be a ROM that implements a HP 17Bii style equation solver!
I wish SM could introduce a DM17Bii at some point (but I understand there are all kinds of reasons why that is unlikely)