How about having a synced and editable version of your to-do list on all your devices, including mobile? I've found that to be the main filter for note taking setups. You seem to suggest that there's an emacs plug-in that can handle that?
Swap src and dest as necessary (could use other options but this is compatible with OpenBSD openrsync): rysnc -rlpt --delete notes/ user@lanip:notes